An oil-tanker attack in Iraqi waters sent Brent crude soaring more than 10% back above $100 per barrel Thursday, dragging bitcoin (BTC-USD) down roughly 2% to around $69,600 in Asian trading, according to Bloomberg. The macro headwind, however, landed on one of the busiest regulatory and product-launch days of the year. BlackRock (ETH-USD) ETF, the SEC and CFTC signed a landmark memorandum of understanding to harmonize crypto oversight, and Eightco Holdings BLACKROCK LAUNCHES STAKED ETHEREUM ETF EXPANDING $130B DIGITAL ASSET PLATFORM: The biggest product launch of the day came from BlackRock, which introduced the iShares Staked Ethereum Trust ETF, ETHB, an ETP giving investors exposure to spot ether while generating income by…