Dear friend,
In my opinion, it is depend on how much money you have that you want to invest?
If you have a large number of money you can consider to invest in ETH because price is low nowadays.
If you have not too much money, you can choice some potential altcoins to invest. For right choice, you should study carefully, get information about ICO you want to invest. and an important thing that you should reference to crypto Experts, hear what they say about ICO.
And you remember that you can be adventurous when invest in cryptocurrency. Be careful!