I have 20$ of bitcoin. What should i do with it instead of spending all.Tell me Pls.

That is a little amount of bitcoin, buy more bitcoin now, and the thing to do is to hold your bitcoin in many months or a year. So that when you sell your bitcoin, it is profitable and for sure you will gain huge money. Or after buying bitcoin try to exhange it or trade it? There is a chance that you will gain profit just by trading. If you are investing for longterm, only hold your bitcoin.