If that happens you will have to look behind you to see the moon.

Perhaps they will or most likely have been acquiring bitcoin. There are all of the good reasons that Michael discussed in the podcast with Pomp, but I don't see that as the top risk for the mega companies you note. I could see them starting to take payments in bitcoin and holding that while spending their cash reserves. This would let them acquire bitcoin with minimal board and compliance changes. All of them deal and hedge in multiple currencies.

Cheers