I agree with not creating a faucet. It's not what you can get the most profitable here and... Well you won't be able to create one with only 150$ I'd say, unless you are a real developper already. I wouldn't recommend P2P lending sites also because they're not as sure as they claim to be.
With 150$ the best would probably just to wait and see... You can try to invest in some casinos as said above but... That's not a huge amount so you'll get only a very small fraction of the bankroll.

You might try to check a bit from the trading point of view. Especially right now, btc price has a strong volatility so if you're already used to some kind of classical trading you might profit from that. But if you're new in this too it's not the best solution :/