So the question is, what will digital currencies like Bitcoin do when the bubble pops? I think the answer to that is related more to how China reacts to the pop or the Trump administration's handling of it.

With China's Yuan denominated settlements in decline despite it being added to the SDR basket they make look at a bubble pop as an aggressive economic sanction that puts them in a corner where they can no longer prop up the value of the Yuan by buying US treasury debt.