BlackRock’s IBIT now holds 500,380 BTC, making up about half of all US Bitcoin ETF holdings.Recent trading saw IBIT and others take in over US$670 million after earlier profit-taking of US$550 million.Grayscale has filed for a conversion of its Solana Trust to a Spot ETF.US Bitcoin ETF holdings collectively control 5.156% of all Bitcoin, with IBIT's holdings being a significant portion of this.