Love your videos, I have watched all of them.
My thoughts:
Investopedia defines a bubble as: "a surge in asset prices unwarranted by the fundamentals of the asset and driven by exuberant market behavior."
I agree that the fundamentals of Bitcoin are subjective but I would say that right now we do not have an "exuberant" market.
Calling this market a bubble makes it sound as if it is destined to pop and Bitcoin's value go to zero.
I would avoid the word "bubble" since IMHO it is inaccurate.
While the price may drift down to 5k, if adoption becomes widespread, demand alone (without undue exuberance) could easily push it way above 20k.