I do not have much experience about staking or lending bitcoin, but I think all of those processes would involve you handing your assets over to a third party.
Whoever owns the keys, owns the coins, and it would be impossible for a third party to pay you interest for coins you still hold. You will have to give up self custody, if you wish to gamble on the possibility of earning an interest.
This is apparently one of the best responses to OP.
BTC is money and the idea that entails your investments working for you is mostly describing money. With Bitcoin being a cryptocurrency that exists on a digital field, the rules plays out differently and that implies, either you handling your bitcoin yourself in whatever investment or having a third party site handle it for you through lending or staking but that's not without risk. Your safest means to being your own owner of bitcoin is having it in your own wallet. Not your keys, not your coins.
Owning an establishment and having some staff work for you while you pay them in BTC could be considered having your BTC work for you. Although, it all have to play out in a way that, it would increase your BTC hodling.