Know understand your calculation or the basis to your prediction. And to your questions
1. Depends if there are sellers and the true number of lost Bitcoins.
If everybody is hypothetically willing to sell and there's no lost Bitcoins then yes
But in real life it won't be possible due to reasons I just mentioned
And also the price would be more expensive as the demand exceeds supply.
2. Bitcoin price isn't Bitcoins protocol. Bitcoin protocol is decentralized in nature and few people owning Bitcoin wouldn't directly change that.
Or will it be played by a small number of people like current fiat currencies?
Owning lots of Bitcoin doesn'
t give one the power to print more Bitcoin
And if they are able to change the protocol to suit their needs then that's no longer Bitcoin.