Since the inception of the Federal Reserve System, our fractional reserve banking system has steadily degraded reserve ratio requirements until they finally just did away with them altogether and ushered in our brave new era of zero reserve banking. Banks are not tasked with maintaining any...
https://www.kitco.com/news/2023-04-27/Crypto-did-not-cause-Signature-Silvergate-and-SVB-collapses-and-FTX-exposure-was-minimal-Congressional-report.html
From the report:
https://crsreports.congress.gov/product/pdf/IN/IN12148
That's just fractional reserve banking at it's finest.