I am looking to sell crypto for fiat, which I guess makes me an exchange technically. I agree a measure of regulation is good, although I'm not wanting to pay unnecessary license fees and have overly onerous KYC requirements with which to comply. My business is straight-up legit, I don't have anything to hide but I don't want to pay the 45% tax-rate over here either. Plus, exchange control requirements mean that I have some sort of foreign entity.
On another note, I realize I could potentially incorporate in Ireland and, with a friend working for me from there, be exempt from CFC taxes due︀ to there then being a legit FBE there.