PayPal collects fees. They also restrict access to their platform and funds held on the platform. I am not talking about currency. Let's pretend the world will

PayPal collects fees. They also restrict access to their platform and funds held on the platform. I am not talking about currency. Let's pretend the world will run on dollars indefinitely. Blockchains grease the skids of trade. You will trade with far more individual strangers than you do today. You will trade in new ways that weren't possible before blockchains let us encode the rules for interactions in a world computer. Blockchains will reshape our world. I think our currencies will be defined by blockchains as well, but don't get distracted just because you don't believe that particular bit. Blockchains are bigger than currency.