Cointelegraph reported that market maker Jane Street significantly reduced its Bitcoin ETF holdings and increased its Ethereum ETF positions in the first quarter of this year, according to its 13F filing. The media outlet stated, "Jane Street's BlackRock IBIT holdings decreased by approximately 71% from the previous quarter to 5.9 million shares (about $225 million), while Fidelity FBTC decreased by about 60% to 2 million shares (about $115 million). MicroStrategy (MSTR) stock holdings also decreased by approximately 78%, and the proportion of major mining stocks such as IREN also fell. Conversely, BlackRock ETHA and Fidelity FETH positions increased by a total of $82 million, raising the proportion of Ethereum ETFs. Additionally, the proportion of some cryptocurrency-related stocks, including Riot Platforms (RIOT), Coinbase (COIN), and Galaxy Digital (GLXY), also expanded, indicating a selective portfolio reallocation."