Earlier quoted context omitted.
The problem here is not Bitcoin per se, it is the current state of the real world, where anyone can "buy" and "sell" Bitcoin for legal tender. Bitcoin, in a world where it is the sole currency, has the benefits you quoted.
No. There are currently two super powerful individuals fighting and are allegedly dragging down every thing on the market just because they don't like each other. What makes you think that this would be a good state of affairs for a world currency?
Kind of like how nations compete and in the process to drag everyone else down: Like US and China trade war.