There are a lot of scam PoS coins and Masternodes.
They promise you a ROI with 30 days... you can look at
www.crypto-coinz.net/ for a lot of masternode coins. But you will see what I mean

You should go for safe projects like Ethereum. Ethereum is not PoS currently but will be in the future, or NEO that produce GAS.
I agree that POS is the future of mining I am gearing on it, but I prefer to wait for Ethereum to go POS it's a safe investment for mining but if I can search for a good POS/MASTERNODES coins I'll definitely go for it every crypto investors should have at least an investment in mining.
Ethereum going POS will be a big deal in crypto community, many people are waiting that. POS coins are the future, at least some people say it, cause it you don`t spend so much power with staking, with mining you need a lot of power to run miners.
Dash is also POS, but you need a lot of dash to run masternod, we will see for ethereum how much coins will we need to run a masternode, probably 1000, which is more than 100k dollars for running a node.