If your money can grow better somewhere else, why leave it in your saving account?
Of course, always ask yourself what is the risk your capital is exposed to. Do not believe if someone offer you a way to double your fund with no risk, this is simply impossible.
A real investment has to be a proven system which can balance all the earnings and losings, and still giving you a positive income in long run. The trading tricks are very simple yet difficult: stick to the strategy, read the market signals rather than emotions, consistency, disciplinary, and repeat.
Yes, it does require deep insights, experience and time to be a successful trader. So, as if you rather let a plumber fixes your pipes, why not as well let a professional trader take care of growing your fund?