The people who make money through capital gains all have one thing in common. They all "buy low and sell high". You can try to invest them in BTCJam or similar.
I think it's just basic techniques "buy low and sell high" you have to know more than that if you do not want to lose on the trade.
You can invest by lending money in lending section
Buy low and sell high is not possible in a limited time. Only based on the time correspondence bitcoin price grows, so holding is much needed.