Do you think that world powers will allow to use XMR on their territory ?
They will alow if they control it. When switzland doesn want to release info about some money transfers then some sad men
comes to Switzland and they have convinced them to make changes i guess they had "good" arguments.
Today because of money loudering you have more restricted laws when it will be needed all XMR exchanges will go down
they will impose good law and they will shut it down. XMR would exist p2p but you wont get any fiat window for it that will couse hard drop in volume.
If you want challenge a biggest superpowers and help terrorists with XMR you are on loose side.
And big Russia and China they don't want to much freedom for their people and XMR is problem for them too.
If XMR will be popular in terrorists group it will be shut down.