Two of the banks that were friendliest to the crypto sector and the biggest bank for tech startups all failed in less than a week. While cryptocurrency prices rallied Sunday night after the federal government stepped in to provide a backstop for depositors in two of the banks, the events sparked instability in the stablecoin market.

Silvergate Capital, a central lender to the crypto industry, said on Wednesday that it would be winding down operations and liquidating its bank. Silicon Valley Bank, a major lender to startups, collapsed on Friday after depositors withdrew more than $42 billion following the bank’s Wednesday statement that it needed to raise $2.25 billion to shore up its balance sheet. Signature, which also had a strong crypto focus but was much larger than Silvergate, was seized on Sunday evening by banking regulators.