The cryptocurrency market has seen a significant influx of investments into Bitcoin ETFs, with a record inflow of $646 million in the past week alone, bringing the year-to-date total to $13.8 billion. BlackRock and Fidelity's Bitcoin ETFs have been particularly successful, with BlackRock purchasing 12,000 BTC and Fidelity 6,000 BTC. BlackRock's fund is nearing $18 billion in assets. Grayscale's gBTC ETF, holding 325,690 BTC worth ~$22B, has experienced average daily outflows of $262.8 million, raising concerns about its sustainability. Despite this, Bitcoin ETFs have managed to purchase 7,300 BTC worth $502 million this week, covering all BTC sold by Grayscale, all newly mined BTC, and an additional 2,000 BTC. This surge in ETF activity comes ahead of the Bitcoin halving in 12 days, amid aggressive buying of dips and record low supply on exchanges. The U.S. approval of 11 spot Bitcoin ETFs in January has attracted approximately $10 billion in net inflows within just two months, despite concerns over price manipulation and money laundering. Bitcoin's price has recently surged above $72,000.