I don't think it's ever wise to take out and use all your money.
Giving advice is almost impossible without knowing your situation, but generally speaking you want to diversify over a broad range of assets in order to minimize risk.
Self-custodied Bitcoin is still an incredible asset. It's liquid, accepted globally, you can carry it around in your head and it's the hardest form of money ever invented.
I would definitely want some during a crisis.