Do you think celebrities in the mainstream world are still using Bitcoin for their own benefit?
In my evil perspective,
Maybe, bitcoin is a mainstream thing in their circle. They take benefits from bitcoin, but in a bad way.
For example, to avoid tax in their country.
Well, maybe they can get payment separetely, for example 70 fiat : 30 btc.
Who knows? I dont have any data (from internet) about this. This is just my what if opinion.