We didn't know when our bitcoin is safe in the hacker because hacker knows lot. We didn't know when the hacker hack our bitcoin. The only way that keep our bitcoin safe is by monitoring every time the account.
i think the monst easiest way will be to print out a paper wallet and store all your coins on this wallet .
And keep it safe in a trezor (offline) ! thats more safe than hardware i guress XD
kind regards