What you do is create a PoS "spin-off" from the bitcoin blockchain and try to legitimize it using your influence and economic power.
The market will decide whether is succeeds or fails.
I independently had a similar idea before I learned you were yet again ahead of me.
Here is the sort of similar idea. Clone all the Bitcoin source code to create XCoin. Cleanly add PoS as an option to PoW but turn off PoS. After sufficient testing, e.g. on a testnet, release XCoin clients in lock step with Bitcoind and Bitcoin Core clients. Operate on the existing blockchain where XCoin peers are otherwise indistinguishable from Bitcoin peers. I propose that XCoin clients inform users as to how much dividend they could receive if there were enough of them.
Spin-off the new PoS network by forking the blockchain given an overwhelming number of XCoin clients as compared to validating Bitcoin clients.