I suggest Stakenet (XSN) Project for long-term investment, and it worth buying. They are working on 2nd layer DEX to solve the ETH and BTC scalability problems using the Lightning Network+ Connext network that makes instant trade possible, with the lowest fees on the market. Stakenet DEX will be run by +2700 Masternode that make it completely decentralized, Moreover,
Masternode owners will be able to profit off of the dApps being built on the Stakenet eco-system. The whole Masternode eco-system will grow and host many dApps, from which they can make passive income through fees.