Exchange, as a startup. Sounds pretty unusual. A huge number of legal issues immediately come to mind, regulatory turmoil, etc.. It would seem that, just don't start like that. But, as many people know, there are successful attempts to resist the bureaucracy of the financial world. The history of this confrontation is, of course, largely a virtual component - electronic payment systems. And as we well know, world of software, albeit virtual, with due skill and perseverance, it is quite realistically monetized. The history of the development of such a confrontation / addition can be painted for a long time. But we will focus on one of the extreme events of this front: cryptocurrencies. And even narrow the narrative even further: cryptocurrency exchanges.