China can have most of the bitcoins and most of the transaction but i don't think they will destroy bitcoin, what will they do after destroying bitcoin?
Count the IRL actual money you gave them, fart through silk, and laugh?
You do understand that when teh halvening commeth, mining will become unprofitable for most miners until roughly half of them go out of business, correct
There are some other factors that will affect the number of bitcoin minner being alive, if the price of bitcoin doubles then the miners will still get profit, there will be produced higher quality of miners and the mining will not be stopped by an halving.