Right now they hold around $1.4 trillion from what i read and the US debt now is somewhere around $12 trillion so 80% would be around $ or $10 trillion give or take a few billions that would require some heavy buying .

I think we don't have tofear China to detain supreme power for a littl while

Meanwhile an article from Bloomberg goes the oppositite direction about what most of us think about the UsSdollar's future and i must admit i was impressed by the article considering the facts they cited , maybe you'd be interested in checking it out . They certainly got me thinking .