However, even though this happens, there are a very few coins that prove to become worth to hold for the long term.
Nevertheless, I would like to know which PoS would be best to invest into these days, according to market movement. I'm always on the look for good PoS coins to put my money into, and make my profits grow for the long term.
But this really isn't the way it seems to be playing out with some high stake reward coins. 1337 is back up to 6 sat. You could have bought it for next to nothing a few weeks ago. Buzz and Compound are also up. You're creating Bitcoin from almost nothing so even if you have to sometimes sell for LTC or DOGE, it only costs some of the coins and a $20 - $50 extra staking PC.
After they sank in price, then it's not the same as before, because you are on an even playing field. When they first came out, they started at 50 Satoshi and went down to 1 Sat.