There is a lot of ways on how you can grow your bitcoins First lets go to trading,investing in traidin is the best way to grow your bitcoin an ensure earnings,but be wise on what you will be trading on trading sites.Second is gambling,damn too risky but can give you a lot of profit.Investing on cloud mining this way is a slowly but surely earnings.Last is HYIP, just like gambling HYIP's are risky too and can give you profit
Trading is by far the most reliable thing to do and earn with bitcoin. But if you are inexperienced it is also a good thing to do if you want to lose money.
Starting with small amounts or even better fictive amounts it the best thing to do.