Don't invest anywhere who promises you enormous profit in very short time, ponzi scheems ans so called easy money in general. I would also avoid gambling. Although it might look tempting it's very easy to lose money then to,earn it. Good choice could be altcoin trading, lending on Poloniex and investing in shares.I invest my BTC in MLM. Once I made a contribution and now I have the opportunity to earn a large number of bitcoins. At the moment, this is the most profitable investment for me