This will - for a number of reasons - never happen, the most prominent being that it is time for a major fallout. Bitcoin won't have just another multi-million percent rise anymore. The bubble will burst soon(ish).
The other major reason is that Bitcoins - unlike e.g. stocks - are not "valued" outside the internet. You don't own a real thing when you buy a Bitcoin.

Admittedly, today's money is mostly virtual.
But it won't die. Bitcoin will.