There are multiple possible methods, I myself use signature campaigns to gain some profit, with my other bitcoins I really do nothing else than holding. I think holding right now is one of the best things you can do because of the fact that the bitcoin is gonna rise to a higher amount.
Creating your own online casino can be an amazingly good business to begin with if you got enough money. With a good security and a 100% legit website, you can attract visitors that will make your living.
However you need capital,can't be accomplishe without capital.If you have the BTC definitely go for it.