I think this 4 idea is good :
1. Cloud mining
2. Gambling / become the bankroll (choose a great gambling site)
3. Loan your BTC (be careful)
4. Sell your BTC when price is high
I think we all want to grow our bitcoins. You just have to find your tolerance for risk since there's no profit without taking risks. Question is how much risk for how much profit?
Bigger Risk, Bigger Proft
Small Risk, Small Profit
I'm only take small risk (cloud mining)
1 Cloud mining isn't profitable anymore, you have to be very lucky in order to have some ROI.
2 Gambling is the fastest way to lose all your bitcoins.
3 Loan is very risky, there are people who loans without collaterals, don't do it.
4 Just hold if you aren't an experienced trader.