It is good that mining becomes more ecologically friendly. It will require more electricity and the reputation of cryptocurrency will become better. It is very important that mining will become more ecologically friendly.
Now PoS mining is very popular. PoS mining allow to earn passive income. Also PoS mining does not require so much electricity like PoW mining and it is ecologically friendly.
PoS mining allows earning passive income. But it is necessary to block your tokens. That is why PoS mining is popular only when market raise.
It depends on the capability of the PoS coin, because if the coin has no actual use and will just rely on traders, aside from short lifespan, this is not good for passive income. So you should meticulously select the coin, as much as possible with rock solid application in the market. Because if it is a hit in the market and the use case is not just one-time deal, then, there's hope for the project to sustain its market. Passive income is only true if the project can sustain its presence for long time. So you should look for long lasting use case of the project.