NEM is "less overvalued" than the other top 10 coins, and should double or more yet. Other then that I suggest cashing out and putting the money in a banking account. Or maybe xtrabytes. Proof of signature technology. Unique and a dedicated team. Get it before it's listed on bittrex. Beware the deadline to set up a static node ended at the 50,000th block. They are transitioning to a new blockchain and after that time in the future may open up future static node registration.
https://www.youtube.com/watch?v=VnweayYyhlQThere's no way to say if something is overvalued in crypto. You can't analyze a shitcoin like you can a stock, so it's all just guesswork--and not educated, at that.
Buy low sell high is smart. Unfortunately most people don't do that, they panic when prices drop. I wouldn't touch any of these lesser shitcoins right now, as I think the market is in for further pain.