It’s been nearly a year since Bitcoin exchange-traded funds (ETFs) launched in the U.S. in January, and they’ve seen significant growth.

Spot Bitcoin ETFs have attracted over 500,000 BTC in that time

In a post on X, Vetle Lunde, head of research at digital asset research firm K33, said spot Bitcoin ETFs now have a combined net inflow of 500,925 BTC, which at today’s price is worth over $50.5 billion.

Notably, this milestone was previously achieved by BlackRock’s iShares Bitcoin Trust (IBIT). The fund became the fastest ETF in history to surpass $50 billion in assets under management (AUM), achieving the feat in 228 days and beating the previous record of 1,329 days.

However, with Grayscale’s Bitcoin Trust recording mostly negative flows, it took longer for the combined net inflows into the 12 U.S. spot Bitcoin ETFs to reach the 500,000 BTC mark.

Lunde added: “U.S. ETFs have absorbed over 2.5% of the circulating supply since their launch in January.” According to CoinMarketCap, Bitcoin’s circulating supply currently stands at 19.7 million BTC, with a supply cap of 21 million BTC.

Bitcoin ETFs Continue to Flow Amid Price Surges

The funds have been on an inflow streak for the past two weeks, with Wednesday marking the 10th straight day of inflows. Net inflows into spot Bitcoin ETFs on Wednesday totaled $223 million, according to SoSo Value.

Fidelity’s FBTC led the way with $121.9 million in new investment. GBTC and ARKB saw inflows of $52.27 and $20.13, respectively. However, BlackRock's IBIT maintained neutral flows.

According to the data, the total net inflows into 12 US spot Bitcoin ETFs amounted to $34.58 billion. Growing institutional interest in Bitcoin contributed significantly to the steady inflows into spot Bitcoin ETFs.

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