First you need to decide if you are looking for a long term or short term invest.
After that I would do a research regarding the developer team, activity on social media (e.g. reddit, slack, youtube), validity of the technical concept, market cap etc.
Without going into too much detail you can have a look at Neo (former Antshares), Stratis, Library (LBC), Ripple (XRP) or Steem ;)
But there are so many good ones ... happy research :)
Thanks for the information, I will check all of it =)
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