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.
It is better to not take the risk, I know that the idea of passive income and getting bitcoin in return is very attractive but most of the time that would require to let go of our bitcoin and let someone else have complete control over it.
And this is unacceptable, it is better then to learn how to increase the size of our holdings ourselves, and probably the most popular method to do this is with trading, the success rate is low but that is because the majority of the investors never take the time to actually learn how to trade and protect their money when they make a bad trade.