After today's drop in bitcoin most coins also dropped as expected. So I took this opportunity to see what coins didn't drop and why. (E.g. mona coin isn't affected by bitcoin's price much because most of it's trades are made in JPY and therefore doesn't float on BTC's value)
One coin in particular that caught my attention was RaiBlocks. It uses a DAG based chain somewhat similar in structure to IOTA's tangle, and like IOTA it has no miners and no transaction fees.
The coin currently is not on major exchanges, so my expectation is that it will explode as soon as it hits one and it's accessibility increases.
https://coinmarketcap.com/currencies/raiblocks/#charts
https://raiblocks.net/media/RaiBlocks_FAQ.pdf
I'm pretty confident in this one, but like any investment I could be wrong, so if you follow my recommendation make sure to do so responsibly.