And don't forget about Dai too ! It's a very special coin that never changes its value, Maker does everything for it to stay at 1 $, so as I said, it can be the best way to keep an amount of anything if you don't want it to fluctuate. I believe once Maker coins are more traded (this is the most obvious defect it has) it will rise even higher. As for Nebulas, just see their webpage and their team, it is just impressing the background they have and the way they introduce their methods, by the way, I just made a post about it. It can really rise up like Google did with the search engine market for the data on the Internet. But I'm spoiling the content of my article here haha :D https://steemit.com/altcoin/@loonyfool/nebulas-the-next-blockchain-google