wowww 312 pages for answering to such question, but honestly there is no absolute answer to this question, it depends... on your money, your wealth..
That's true but if you really want your money to grow then I think you should invest your money to get benefits from it in long run as saving will never allow you to grow your money.
If you invest your money then you are accepting the risk of losing all of your money and it is not good..!