So my advice is to make your own coin with this idea and see how it goes, but I must warn you (if you didn't already know) that it may be a wasted effort.
You can make your own fork too instead of coin, but then you may face the hate of some (especially if you'll use the word Bitcoin in your fork's name) and some of those having bitcoin will probably dump their fork-coins as soon as you'll give them the opportunity.
Of course, you are free to try.
PS. You should start with reading more about PoW and PoS, you seem to have quite some misconceptions here and there.
I'm not worried about a sell-off (you probably already know why). I don't need to mine my own fork, if all the "economically relevant nodes" agree to reject a fork then the other nodes have no choice but to follow (even if they are not aware of the new rule). I expected some resistance from miners but who else would refuse to have a vote?
@ModelT,
my mailbox is fixed