There is a woman pushing bitcoin now in Argentina, IIRC she is claiming 1 M USD/BTC; I think she was mentioned in the WSJ.  And those numbers were still thrown around last December, when I started gawking.

It is possible of course.  It is possible also that 1 DOGE will be worth 1 trillion dollars too, if DOGE gets to be the only internet currency in use, and there will be only 1 DOGE in circulation (all the others being owned and hoarded by @fonzie).  Crazier things have come to pass...