There was an application I remember, not sure if it still exists, called Aardvark for people to get answers to questions online from experts. This seems like a similar approach except paid. I see it's entirely geared toward blockchain though. Would be interesting if you could open up another segment for other types of professional consultations, i.e. Medical, legal, real estate.

Edit: I guess it is for everything upon further inspection. this makes it much more appealing across industries.