In my opinion, it's wiser to invest your savings. Because saving itself, for example, putting your money in a piggy bank or any containers, it takes time before it increases. However if you have enough money, you can invest them. If you're not familiar or it's only your first time, then you can invest at least 5-10% of your income then save the rest on your piggy bank or whatever you call it. It is helpful especially when you knows how to handle money that much. Also, it will let you know the process of investment and techniques in order to gain what you really want.
Saving money slowly decreases wealth over time as money loses value due to inflation. On the other side, investment carries risk of loss of principal and no investment is truly "safe" from loss. Both of these things need to be understood in order to devise a savings and investment strategy that is right for a particular individual. Sitting on cash is the most conservative thing you can do as the only risk to the value is loss of wealth over time due to inflation, which is comparatively low. Even putting money in a savings account generally will not keep up with the inflation rate, so it only slightly lowers the loss of value while increasing the risk of loss due to investment activity (e.g., if the bank fails). More active investments can increase your wealth, but also carry much higher risks of loss due to failure of the business. There's no totally safe place to put money, anything you do or don't do with it invariably carries risk.