We all know that gambling is wasting of time and bitcoin. Though, faucet also does waste time also but there are some faucet that pay the highest satoshi while signature campaign and trading is good. Besides, the signature campaign i'm on is one of the best at the moment.
Signature campaigns are the best at the moment but that could change because a moderator is wanting to strike it's use on the forum.
So that method of making bitcoin here might change.
Yeah We can find lots of ways to get some Bitcoins, as you said best way is to have a signature campaign because so you will earn more money with it and you are losing nothing and that is the best.If you have already Bitcoin you also can trade to make some profit if you are waiting for a good price increase but be careful with scammers.