I would suggest staying on bitcoin right now but if you want to risk it, i would say low cap market coins would be the best for risking a little.
Semux and veil are two shining stars in that category.
until now no investor can predict for sure about the development of the crypto currency going forward and that is the nature and risk of investing with cryptocurrencies and altcoins. It requires the confidence of each investor as the best capital in investing.