It's essentially impossible not to be hacked isn't it?
When so much money is at stake (almost) everyone will have a price including insiders.
I keep my money with traditional boring financial institutions instead of tech startup clowns so it's been very easy not to get hacked.
If you're concerned you can literally print your crypto keys onto a piece of paper. Maybe encrypted with a passphrase. It might get stolen or lost but it's not getting hacked.
P.S. If you're really paranoid don't use a network-connected printer.