Ethereum, XRP, Ark, Siacoin
None of these will provide
HUGE RETURNPossibly ark.
Depends how much you invest really, Ethereum will continue to grow but ofcourse if you invest 100$ you wont have HUGE RETURN, the others are more risky but can earn you a lot more.
for now I advise you to invest in Ethereum, NEO, Litecoin, and Bitcoin because I am sure that with the above coins you can get a profit when everything has stabilized especially Ethereum and Bitcoin have good growth and can be profitable in the future