1. Invest
2. Play games
3. Mining
4. Gamble
And probably more things that i can't think off right now
Invest wisely, dont think investing is an easy task to earn bitcoins, same as gambling it has risks. I dont really get when you say playing games because playing games with bitcoin is considered gambling, unless it is a faucet. And the Op as what to do with bitcoin, not how to get bitcoin, so bitcoin is out of the list.
I think the best way to invest bitcoin is stock it at your wallet because as you can see now the bitcoin is pumpimg and pumping. And the best way to earn is to invest or stock it at your wallet at wait for pick price and then sell it. It is profitable because the bitcoin price is pumping so better save bitcoins now.