MASS (https://massnet.org/en/) is based on the Proof of capacity (PoC) consensus algorithm that is decentralizing the mining industry. Anyone with storage space can mine this coin, there is no need of expensive miners and paying for electricity. A few days back it was said that it's just a useless coin like the rest of new Altcoins but very recently it's listed at MXC exchange and as of this writing, its value is 0.69980$. Please have a look at the following resource and you will get to know that it's a good coin to keep in your portfolio.