
US spot Bitcoin ETFs attracted about $1 billion in inflows over a week, marking their best performance since April. This surge followed a major security breach in the Coldcard hardware wallet, which compromised over 5,200 wallets and raised doubts about self-custody safety. Investors shifted towards regulated Bitcoin ETFs with institutional-grade custody, led by BlackRock's iShares Bitcoin Trust, which alone drew $757.5 million. This trend highlights growing trust in regulated custody solutions over self-managed wallets.