Earlier quoted context omitted.
Why does any of this require ethereum? We have all kinds of markets already, ones that are much faster, more liquid and more efficient than any blockchain-backed exchanges. There's nothing stopping a recording artist from incorporating and listing shares on any traditional exchanges, or you from making a new exchange. Literally the only things Ethereum adds are decentralization and no way to dispute or reverse transa…
To trust a currency, you must trust the institutions that manage that currency. You have no control over it. To trust a cryptocurrency, you must trust the algorithm that runs it. It's fully auditable and predictable. It still takes me several business days to complete an ACH transaction in the US, and requires I trust the banking system. Transferring cryptocurrencies happen much faster and don't require the same kind…
Many other countries have systems that allow for nearly immediate person-to-person money transfer without blockchains: https://en.wikipedia.org/wiki/Faster_Payments_Service This is not a good argument for cryptocurrency.
Regarding "trusting" an algorithm: in the real world you also have to trust the implementation, and the configuration, and eventually humans involved in the transaction. How often do we see some big data breach on HN? Very rarely has any cryptographic algorithm been broken, but often one of the other links in the trust chain has broken.