There are other altcoins that will outperform NEM on a pure percentage basis so make sure to diversify your investments. What I hold.. NEM, VIA, PASC, XBY, BAY, ARK, BLK, SHIFT, BSD. Was going to buy NXT at $70M market cap but didn't.. NXT could end up competing with ETH in the long haul with Ardor and their child chain tech and the fact people are starting to issue tokens with their tech. I probably won't buy it above $100M which will probably end up being a mistake. Honestly if I had to chose between NEM and NXT/Ardor, I'd take NXT/Ardor at this point because it's less expensive. The fact they didn't do an ICO with Ardor increases my confidence in the project, though apparently they do plan to do an ICO with Ignis, one of the Ardor child chains. We'll see if they can resist the urge to milk these child chains by doing a bunch of ICOs in the future. At least they are honest about their intentions.. they ARE going to convert it to fiat.
https://www.jelurida.com/icoI would be careful with Nxt. Nxt was the first "blockchain 2.0" coin out there and their tech has always been ahead of the curve yet nothing ever happens because of the absolutely horrible initial distribution that will forever haunt that coin. I've been watching Nxt since it was launched (I found Nem through Nxt) and every time it starts to rise a massive dumping from the whales who have been waiting 5 years to cash out begins.