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.
P.S. If you're really paranoid don't use a network-connected printer.
And yes, this is somewhat absurd. But so are online transactions that can be hacked with no backsies.