According to Cointelegraph: The last four days have seen Bitcoin exchange-traded funds (ETFs) attracting more net inflows than the first four weeks of trading combined, with an excess of $2.2 billion pouring in.

Apollo's data, a Bitcoin tracking platform, reveals that 10 spot Bitcoin ETFs collected around 43,300 Bitcoin, valued at approximately $2.3 billion, during the past four days. Comparatively, these funds took 20 trading days to accumulate inflows of about 42,000 Bitcoin.
Four spot Bitcoin ETFs, excluding Grayscale, have now joined the "billionaire club" as Bitwise's Bitcoin ETF crossed the billion-dollar mark on February 14. The performance of Bitwise was marked as particularly notable by Nate Geraci, President of the ETF Store, as it is the only crypto-native investment fund among the top providers.
BlackRock's iShares Bitcoin Trust, Fidelity's Wise Origin Bitcoin Trust, and Cathie Wood's Ark 21Shares Bitcoin Trust had previously achieved billion-dollar status. Meanwhile, the remaining ETFs, including those by Invesco, VanEck, Valkyrie, and Franklin Templeton, have yet to surpass $500 million in assets under management (AUM).
WisdomTree's Bitcoin Trust, having struggled to achieve substantial inflows, currently sits in the last place among Bitcoin ETFs, with only $23 million in AUM. On February 13, BlackRock’s iShares Bitcoin Trust emerged as the first Bitcoin ETF to exceed $5 billion in AUM, currently holding 105,280 BTC.
This strong inflow into Bitcoin ETFs has been regarded as a key catalyst for the recent Bitcoin rally, which saw its price surpass the $50,000 mark on February 12.