Well their own currencies sucks,having bitcoin,will mean have something like gold,or the strongests fiat,being dollar euro or others,this are very strong and almost stable at their values,soo i believe this is what people are investing at bitcoin ,to protect their capital at euro/dollar.
Yes, that is true
Because the technological currency bitcoin where all the money can use bitcoin around the world.
So they do not have to bother anymore exchange currency..