There’s a neat paper showing that you can have trustless decentralised exchanges only for on-chain assets, ie exchanging one crypto for another. Real world asse

There’s a neat paper showing that you can have trustless decentralised exchanges only for on-chain assets, ie exchanging one crypto for another. Real world assets (including fiat) cannot be securely bought on blockchains. Irrationality, Extortion, or Trusted Third-parties: Why it is Impossible to Buy and Sell Physical Goods Securely on the Blockchain https://arxiv.org/abs/2110.09857 https://arxiv.org/abs/2110.09857