NYSE Arca and NYSE American have eliminated the 25,000-contract position limit for options tied to 11 Bitcoin and Ether exchange-traded funds after rule filings published March 10. The SEC acknowledged the changes on Sunday and waived the usual 30-day delay, putting the new rules into effect. The update also permits trading these ETF options as FLEX options with customizable strike prices and expiration dates.

A long-inactive Satoshi-era Bitcoin wallet made a small test transfer after nearly 14 years, moving about $47 in BTC from “1NB3Z…QB6ZX” to a new address at 10:27am UTC on Friday. The wallet still holds 2,100 BTC valued at nearly $148 million at current prices, after acquiring the coins in July 2012 for roughly $6.5 each (about $13,685 total). The move does not confirm an imminent sale, though whale activity is often watched for short-term market signals.

Grayscale filed an S-1 on Friday for a proposed spot Hyperliquid ETF that would track HYPE and trade as GHYP on Nasdaq if approved. The filing names Coinbase as custodian and does not list a management fee, while noting staking rewards are not planned at launch but could be considered later under certain conditions.

A federal appeals court has refused Kalshi's emergency bid to pause proceedings, a move that could allow Nevada regulators to block the firm's sports event contracts. Gaming lawyer Daniel Wallach said a state-court temporary restraining order now appears imminent and could keep Kalshi from operating in Nevada for at least 14 days while a preliminary injunction hearing is scheduled.

On March 1, crypto e-commerce firm Bitrefill reported a cyberattack involving an employee's compromised laptop, hot wallet theft and access to 18,500 purchase records. The firm linked the tactics to North Korean groups Lazarus and possibly BlueNoroff, and said it will cover the undisclosed losses using its operational capital. Bitrefill added that core services and sales volumes have largely returned to normal after introducing stronger security controls.

Since March 9, US-listed spot Bitcoin ETFs have accumulated $962.8 million in net inflows across six consecutive trading days, while Bitcoin has advanced 12.5% from $65,960 to $74,250. On Monday alone, the products added $199.4 million, led by BlackRock's IBIT and Fidelity's Wise Origin Bitcoin Fund.

Nonfungible token marketplace OpenSea has postponed the March 30 launch of its SEA token, saying current crypto conditions are too difficult and the token is not ready. The token, first unveiled in October as part of a shift toward a multi-chain "trade everything" app, was meant to power fee discounts, creator rewards and governance. OpenSea is ending its Waves rewards campaign and offering certain users fee refunds as the broader NFT market cap has dropped from $3.2 billion on Jan. 15 to $1.62 billion.

Aave plans to introduce a protection tool called "Aave Shield" that will block swaps with more than 25% price impact after a user lost over $50 million swapping USDT for AAVE through its interface last week. The loss occurred when $50.4 million in USDt was exchanged via CoW Swap but returned only about $36,500 in AAVE due to thin liquidity, infrastructure issues and a sandwich attack by an MEV bot.

On Thursday, BlackRock launched the iShares Staked Ethereum Trust (ETHB), adding a staking-focused Ether ETF to its existing spot Bitcoin and Ether products that began trading in 2024. Robert Mitchnick said BlackRock will avoid more complex or exotic crypto ETF designs, even as ETHB recorded over $15.5 million in first-day trading volume and $43.5 million in inflows. He added that BlackRock is also developing a Bitcoin Premium Income ETF while investor demand remains concentrated in Bitcoin and Ether.