As far as I know, Coinbase works this way. They don't transact, trade, or create derivatives of the crypto coins they manage. They simply make a profit by charg

As far as I know, Coinbase works this way. They don't transact, trade, or create derivatives of the crypto coins they manage. They simply make a profit by charging a fee per trade. They are regulated and a publicly traded company (which means certain standards of accounting) so they might be one of the only ones standing when this thing is done falling down. These other exchanges are doing far more exotic things like creating their own coins to grant status on their exchange and creating derivatives so traders have more leverage and therefore action. Coinbase would be considered boring to these users since it is a vanilla exchange.