I am not 100% sure, but my understanding is that the bank is liable for those losses unless they can prove gross negligence on your part. I've heard that legal argument, at least. [0]

Though this is not worse from your cryptocurrency. If they get a hold of your private keys, you lose everything. At least in the classical banking system you have some legal recourse.

[0]: I might just be thinking of this comedy sketch though: https://www.youtube.com/watch?v=CS9ptA3Ya9E