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Solana applied a mainnet upgrade at 1:00 a.m. UTC on Sept. 15 that increased the maximum transaction size to 4,096 bytes from 1,232 bytes, Cointelegraph reported. The change allows more complex operations, such as zero-knowledge proofs and multisignature functions, to be handled in a single transaction. Compatibility with existing transactions remains intact, but protocols seeking to use the expanded capacity must update to the newly introduced v1 transaction format.

Bitcoin has moved out of its bottom range and is entering a full-fledged upward rally, according to crypto analyst CW. CW said long-term holder SOPR, an indicator showing whether holders sold BTC at a profit, has recently turned higher and moved above one. That suggests the market has shifted from a bearish phase to a neutral state, with a more sustained uptrend now beginning. CW added long-term holder SOPR has not reached six in this cycle. In past cycles, market tops formed around that level, meaning broad profit-taking by long-term holders has yet to emerge this time. In cycle terms, CW said, the rally in its truest sense had not even started until now. CW also said Bitcoin's move so far had been a preparation phase for a larger rally. Long-term holders' BTC balances are at record levels, and accumulation continued until recently, CW said.

A BIT-linked address deposited 1,400 BTC worth $107.8 million into Binance and withdrew 10,000 ETH worth $24.67 million from the exchange, according to Lookonchain. Exchange deposits are typically interpreted as a selling signal, while withdrawals are generally seen as a sign of accumulation.

About $7.73 million in assets was stolen from a specific Gnosis Safe wallet after attackers exploited an authorization-check vulnerability in a related contract, blockchain security firm SlowMist said on X. SlowMist said the attackers moved assets from the affected wallet into a liquidity pool they had created, then swapped them for other assets to steal the victims’ funds.

U.S. Republican Senator Cynthia Lummis, a prominent crypto supporter, said the CLARITY Act would allow U.S. banks to directly buy and hold cryptocurrencies including Bitcoin if it passes, CoinGape reported. In an interview with Bloomberg Crypto on Sept. 15, Lummis said BTC would rise sharply if the bill is approved and argued that allowing banks to hold crypto could drive large-scale capital inflows. Section 401 of the CLARITY Act includes provisions allowing U.S. banks to directly buy and sell cryptocurrencies, according to the report. Meanwhile, the U.S. Senate is set to hold a cloture vote on Sept. 15 to decide whether to advance the bill to floor consideration, and with Republicans holding 53 seats, at least seven Democratic senators would need to vote in favor to reach the 60 votes required for passage, the outlet said.

Upbit released a revised TFUEL circulation plan at the request of the Theta Fuel side. Compared with the plan submitted on Dec. 31, 2024, the estimated inflation rate was adjusted higher, implying an annualized increase in circulating supply of about 5.12%. According to CoinMarketCap, TFUEL was trading at $0.009519, down 6.06%, at the time of writing.

Hong Kong-based crypto card issuer RedotPay has fully suspended new card issuance for South Korean users, Seoul Economic Daily reported today. RedotPay recently blocked issuance of not only physical cards for South Korean users but also virtual cards that can be registered with simple payment services such as Apple Pay and Samsung Pay. When users in South Korea try to apply for a card through the RedotPay app, the application is blocked with a notice saying, "Currently, card applications are temporarily unavailable in this region." The company also ended its affiliate program on Sept. 7 with partners and influencers in South Korea that had provided guidance on signing up for RedotPay and applying for cards or had shared referral codes. In May last year, RedotPay suspended new physical card issuance for South Korean users before resuming it a few months later.

If BTC falls below $76,469, about $211.22 million in long positions on major centralized exchanges could be liquidated, according to CoinGlass data. If BTC rises above $77,043, about $168.43 million in short positions could be liquidated.

South Korea’s Fair Trade Commission sees no conflict between limits on equity ownership in digital asset exchanges and the Fair Trade Act, Digital Asset reported. According to material the National Assembly Research Service submitted today to the office of Democratic Party lawmaker Park Min-gyu, the commission said the Fair Trade Act is designed to align ownership and responsibility within holding company structures, while ownership caps on digital asset exchanges aim to ensure fairness through dispersed ownership given the industry’s characteristics, making it difficult to view the two as being in legal conflict.

South Korean lawmaker Kang Jun-hyun of the Democratic Party said the delay in legislation for a basic law on digital assets has effectively been narrowed to a single issue: a provision limiting major shareholders’ stakes in crypto exchanges, Maeil Business Newspaper reported. In an interview with the outlet, Kang said the ownership cap, which he described as the main reason for the legislative delay, should be handled separately from the basic law. Kang said the issue resurfaced late in the process without sufficient public debate, sending two years of discussions back to square one. Kang added that if legislation is being blocked over the ownership cap alone, the basic law should be enacted first and the stake limit could be supplemented later through a social consensus, whether at 20% or 30%.

South Korean Democratic Party lawmaker Kang Jun-hyun said gains from virtual assets should be taxed under the principle that income, whether from stocks or cryptocurrencies, should be subject to taxation, according to an interview with Maeil Business Newspaper. Kang added that, because tax reform is a sensitive issue, sufficient social consensus and advance communication are needed, taking into account concerns that the market could contract. Kang has been deeply involved in discussions on enacting a basic law on digital assets while serving as the ruling party’s secretary on the National Policy Committee in the National Assembly and as a member of the Democratic Party’s digital asset task force.

Binance co-founder Changpeng Zhao, better known as CZ, said Chinese-rooted crypto exchange CoinEx's recently announced shutdown differs from past exchange collapse cases, according to U.Today. Zhao pointed to CoinEx’s guarantee that users can withdraw their assets, and said some exchanges that closed during the recent crypto downturn at least allowed users to withdraw funds, unlike QuadrigaCX, a Canadian crypto exchange that went bankrupt in 2019 and left customer funds trapped.

OKX announced the addition of the PONS/USDT spot trading pair at 2:30 p.m. UTC today.

Bitcoin short-term holders have remained in profit for about a month, forming a pattern seen near the end of past bear markets, CryptoQuant contributor Darkfost said on X. Darkfost said unrealized profits on BTC held by short-term holders are estimated at about $168 billion, while unrealized losses stand at slightly above $100 billion. In January, short-term holders briefly returned to profit but failed to hold those gains for more than a week, while in May more supply remained underwater. During the 2022-2023 bear market, the market trend reversed after short-term holders stayed in profit for a sustained period, Darkfost added. If BTC holds current levels and stabilizes above $80,000, the pattern could become a key indicator for judging whether the bear market has ended.

The U.S. House Ways and Means Committee is pushing a bill, H.R. 10357, that would exempt cryptocurrency transactions under $10 from taxes, Bitcoin.com reported. The exemption would not apply to users whose asset transfers exceeded 5,000 transactions in the previous year. A separate bill being advanced alongside it would apply wash-sale rules to crypto, targeting cases where investors sell at a loss and immediately repurchase the asset to use the loss as a tax deduction.

According to CoinNess market monitoring, BTC has fallen below $77,000. BTC is trading at $76,986.82 on the Binance USDT market.

Kakao Games said it decided at a board meeting today to acquire a 39.56% stake in social casino and casual game company Me2on for about 98 billion won ($72.5 million), a move that would make Kakao Games the company’s largest shareholder and give it management control once the deal closes. The acquisition is aimed at diversifying Kakao Games’ game portfolio and strengthening its overseas business and earnings base, Chosun Biz reported.

South Korean exchange Upbit announced it will temporarily suspend deposits and withdrawals for Avalanche (AVAX) and Nexpace (NXPC) at 2:30 p.m. UTC on Sept. 22 due to a network upgrade on the Avalanche chain.

Zama said it will launch deposit services for 16 privacy vaults on Morpho. Supported assets include USDC, USDT, AUSD and TGBP. In June, Zama launched its first privacy-focused vault on Morpho with Steakhouse Financial.

Altcoin deposit inflows to Binance have risen sharply ahead of a procedural vote on the U.S. Clarity Act and the Federal Reserve’s rate decision, according to an analysis by on-chain analyst Darkfost. Darkfost said Binance’s seven-day average altcoin deposit count climbed about fourfold to 31,800 from 8,300 in July, while Coinbase rose to 4,700 from 2,200 over the same period and Bybit increased to 2,700. Darkfost added Bitcoin has gained more than 30% in just a few days, while TOTAL3, a measure of altcoin market capitalization, has increased by more than $136 billion over that span. Selling pressure is not yet at an abnormally high level, Darkfost said, but the analyst noted the market’s uncertainty persists and the trend warrants close monitoring.

OKX announced the addition of the VVV/USDT spot trading pair at 2:00 p.m. UTC today.

Sky Protocol said it has completed its first SKY token burn, removing 2.86 million SKY equal to 5% of the protocol’s net surplus.

Kelp DAO said via X it detected potentially suspicious activity at a specific address beginning with 0xc70f that received rsETH a few hours earlier, and applied a 24-hour precautionary freeze to the address. During that period, rsETH deposits and withdrawals from the wallet will be restricted, Kelp DAO said. Kelp DAO added its contracts remain secure, rsETH is fully collateralized, and all operations, including minting, withdrawals, and integrations with external protocols, are continuing normally. The project also said users do not need to take any action. Kelp DAO suffered a $292 million hack in April 2026.

Tokenized real-world asset platform Arco said it signed an MOU with Hong Kong virtual asset trading platform EX.IO to support institutional adoption of tokenized RWAs and broaden distribution across Asia. EX.IO currently offers more than 30 tokenized RWA products on its platform backed by assets including gold, silver, stocks and bonds. Under the agreement, EX.IO plans to provide Arco with tokenized U.S. Treasurys, money market funds, private credit and bond products, subject to regulatory approval. The two companies also plan to continue expanding their footprint in Asia and the blockchain networks they work with.

About $7.73 million worth of rsETH was stolen from an anonymous Ethereum Safe wallet in a hacking attack, Blockaid reported. The attacker exploited a publicly callable keeper multicall function and linked a custom Uniswap v4 liquidity provision module installed on the Safe to a hook pool created by the attacker.