It all depends on what kind of an investor you are. If you want something safe but still with great potential, Dash and EOS are the top 2 picks. https://www.dashforcenews.com should give you lots of insights. The upcoming Dash Evolution would turn the currency into something like a Decentralized PayPal. Even currently it is has 1.3 second transaction that cost just few cents and they have PrivateSend and high merchant adoption with 1600+ merchants in Venezuela alone: http://www.discoverdash.com

EOS is basically the ETH killer: http://www.blocktivity.info It improves upon the tech behind STEEM.

You can also try a mid sized project like STEEM. MCO, Komodo, Enigma or Elastos Click on the links to read about them. Some of them are my old posts.

You can also bet on coins that are like sleeping giants that can blow up anytime. Few of them are Byteball, PIVX, SONM, Substratum and BAT. Give them a little reading time.