This is my reasoning - there's political instability at the moment, and I'd like the option to change countries as necessary. Stable countries like the US have violent riots, less stable ones are facing coups and spiraling debt.
that is my guess too. It certainly feels like "there is no good place to keep money". There is so much instability around the world at the moment, it feels even the traditionally more stable ones like real estate and gold are at jeopardy. People are fusing money into anywhere that's seemingly more safe than cash just to make the most out of it in the event that any major political shift happens.