On the contrary, centrally authorized systems can be extremely fast and cheap. Postgres outperforms any blockchain. The issues are about authority and power, an

On the contrary, centrally authorized systems can be extremely fast and cheap. Postgres outperforms any blockchain. The issues are about authority and power, and also the barriers to innovation and access which that power imposes. Payment channels can solve scaling issues in blockchains just like various settlement layers solve the slowness of bank transfers. Some people don't want such a solution, but it's still a solution. Development doesn't happen the way we want. Some people want cryptocurrencies to stop existing, which seems unlikely. Bitcoin's development is really thorny because of diverse interests and general incentivized hostility; that's just reality. Maybe a faster blockchain will gradually take Bitcoin's market share. Maybe Bitcoin will remain quite valuable. If you know a certain answer to this, there are large profit opportunities!