The United States spot Bitcoin exchange-traded funds (ETFs) had their best week since July, with inflows of almost $1.1 billion.The best-performing day was on September 27th, when $494.4 million was added.The iShares Bitcoin Trust received $499 million in weekly flows, followed by ARK 21Shares Bitcoin ETF with $289.5 million.Total inflow for all eleven spot ETFs since launch has reached $18.8 billion.