Bear is knocking on the door, together with post-Merge situation, we are all witnesses of devastation of POW coins.

Main problems: -big farms getting in and out, resulting increase the Dif...
                       -lot's of miners in fear dumping coins, resulting price drop...

Proposal how to save POW: prerequirement to mining is that you have coins in your wallet(or node)
for example: 1 coin = 1 mh/s, no need to lock coins, just to own them.You need to have desktop wallet(or node), with deposited coins, active on network.
Direct your rigs to your wallet(or node), miner program checks amount of deposited coins, and approve strenght of your hardware.

Pros: -who want's to mine need's to HODL coins, if you don't have coins you must buy them, that's how we create demand on exchange
        -that's how we prevent centralisation (big farms)
        -in that way we prevent miners to dump coins
        - take the best from both worlds, MN and POW
        - natural growth of network, because total hash power is proportional to total coin suply
        - only those who belive in certain project, buy coins and HODL, can mine and earn

Cons: -i don't know any, you tell me in comments...