How come you never talk about Bitshares? You say that everything is going to be on the blockchain but dont mention Bitshares? If you dont know what it is, you really should research it.
It is a Decentralized Exchange (DEX) that operates on the blockchain. It is the worlds fastest blockchain that can process more transactions than nasdaq and visa combined. You can even store FIAT money on it (smart contracts). And the fees are next to null