I care if the USA ceases to exist 30 years from now. Are you suggesting that if Whites become a minority then the USA will cease to exist in 30 years? If so, then that is an excellent example of a non sequitor.
The land mass will still be here. The United States will exist as a geographical expression and a chapter in history books. Hopefully by then, the United States will have broken up and each state become interdependent and autonomous.
In case you haven't noticed, minorities don't like to live with other minorities. Diversity and multiculturalism are wholly white constructs. Some states will come under the protection of stronger nations. Perhaps the border states at the north will join Canada. California and Nevada will almost certainly become Chinese territory. The southwest will be the lawless land of criminal cartels.
Someone wrote about this not long ago. The US will break up into (I believe he saw seven) components.