Definitely NEM (XEM), watch this:

https://bitcointalk.org/index.php?topic=2540917.0

Their fundamentals are so huge!
Look at their partner:
https://nem.io/enterprise/partner-companies/

And there are many many others which aren't official at the moment.


They even will launch their own regulated exchange in australia in the next weeks:
http://www.the-blockchain.com/2017/07/27/nem-io-foundation-create-xem-exchange/


They will spend 40 million $ in 2018 to expand.
They aren't even listed at the huge exchanges because the foundation didnt want to pay for it. But for 2018 they wanna join every big exchange. Once they are listed, their volume and price will explode.