If you want staking coins. I suggest to visit Binance exchange, they have some staking rewards for just holding the coins or tokens on your wallet. They already pay last month reward and the ROI isn't that much cause it will depend on the value of the token or coin you stake but it's still profit. Also some other exchange offering already this type of services. POS coins are actually a trend now and might be the next method next to IEOs.
POS coins has been around even the ICO is not even started so idont think this will be the new trend . The problem is not the rewards they given but the price is always affected because of free coins given to people who stakes thier coins. The more people stakes the more price been affected because it will make many new sellers who want to sell thier profit from stakings.
I also agree with you, POS projects often fail after a period of operation. Therefore, investing in POS projects is often not profitable because investors will sell all their shares and cause the price to collapse. I am no longer interested in these projects, because I have invested in it and I have completely lost after 2 years of investment.