BTC's limited blocksize unfortunately also limits the potential of bank runs. The technological understanding of most Bitcoiners also limits the likelihood of a bank run. So market participants and exchanges have plenty of time to adjust their strategies while they halt withdrawals. All of them learned from Mt.Gox and FTX mistakes.
Monero has gone through some years of heavy fractional reserving. But due to regulation it gets now delisted from all exchanges which ironically increases self-custody to close to 100%.