Trading is like playing with your investments. In crypto market you can search for some exchange website like Bittrex. Go on there, buy diffrent altcoins and gain profit from buying low, selling high.
Investing is just investment with expectations that the thing you invested in will grow and then you can sell stocks, tokens or what you bought into cash.

Trading is more risky but it's more rewarding. If you have time and will i would suggest trying to trade. But first learn how to do it properly so you dont lose all of your money or most of it.