Keeping your money in the bank means the executor of your will can usually get it through a straightforward process. Keeping your money in crypto means that, by default, it dies with you, unless you take special effort to ensure otherwise, and are willing to trust a solution you can't possibly debug because you'll be dead.
Depending on how much you trust your government, bank, and judicial system, inability for them to access your money after your death is a feature, not a bug, because it means they also can't easily block or steal it during your life. As people in China who have had their bank accounts frozen for months, and now their health status flagged red when they were planning to protest, are finding out, https://www.cnn.com/20…
(A conspiracy theory I have no evidence for but might believe is that the US has been very tolerant of cryptocurrency and stablecoins for the same reason as China bans them: enabling capital flight from China to the US.)