Hacking/phishing/social engineering into private bank accounts is quite common, probably more than into cryptocurrency wallets.
It's easy and highly encouraged by every cryptocurrency wallet to backup your wallet seed, so losing a device is not a problem unless you ignore that advice.
> But you usually don't keep all your money in cash in the same place, as you do with bitcoins.
I don't, I have them split into multiple wallets, sort of like my fiat money.
I carry a small amount on my phone but most of the BTC I own in on a cold/hardware wallet. That stays home just like the debit card for my main bank account.