If you aren't after the kind of yield-earning staking, which is risky and doesn't even guarantee you of a profit, and you also don't like time locks, then consider putting your back up in a sealed container and then in a solid case and bury it. If not, cement it. Or bury it under a tile. I doubt if you would still dig it every time you feel a little panic when the price goes down or whenever you're bored and want to play poker or place a bet on a sports match.