NXT is one of the truly innovative coins, including a decentralized asset exchange and product marketplace in the wallet. Other coins such as NEM and Burst are derived from NXT, so I think it's an essential and safe investment to include in one's portfolio.

One thing I am not up to date on is the new ARDR blockchain - any idea on if that will make NXT obsolete, or is it totally separate? I will need to research that some more.