I'm a miner that stakes some coins like Cardano, Cosmos and Tezos. But the return of staking is VERY low, atleast for me. I calculated if I will invest $5000 into for example Cardano. I will get right now, 21834 ADA (price $2.24). I stake those at 4.91% in Exodus. I will get 1091 ADA ($2445) a year. It will take 20 YEARS to ROI 
My mining rigs have ROIed like 5-7 times since 2017-2019. But that's mainly to the price increase, of course.
My mining rigs have ROIed like 5-7 times since 2017-2019. But that's mainly to the price increase, of course.
ETH going pos will not be any different however most of eth will or was created on pow so it has a lot more chance to survive than the other pos coins. POS coins are like stocks, value from nothing, pyramid scheme. Stocks are also proof of stake hehe but for that to work sheeps have to keep buying in order to increase a value from nothing hehe, reason I never invested on stocks or POS.
The algorithm change was planned at the very beginning, but the miners were given the opportunity to mine some coins.
When investing, it is now better for the project to have a POS algorithm, against the background of green energy, global warming, etc.