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Hi. This is a good article explaining POS and gives a rundown of the different coins. You get rewards for "staking" your coins on the network. These can range anywhere in the range of 3-10 percent a year, maybe more for Masternodes. Much, much more than you would receive in a bank. The payouts are received in the currency you are staking. For example, if you are staking Stratis, the payouts would be in Stratis. Some popular POS coins are Pivx, Nav, and POSW.
https://virtualrealitytimes.com/2017/07/19/list-of-proof-of-stake-pos-cryptocurrencies/