···2020- Blockchains solve distribution problems but they don't solve the problem of who will add the money to the ecosystem. That's a political one. Unless there are good incentives to move to blockchains.
2121 - Once a system moves to a blockchain, it'll get its properties (e.g: transparency and verifiability).
2222- Open source has the failure mode of not enough incentives, cryptocurrency has the failure mode of excessive and overly concentrated incentives.
2323-- Blockchain incentives can have large real world undesired second order consequences. E.g: Bitcoin incentivizes miners to use a lot of energy.
2323+- Blockchain incentives have large real world undesired second order consequences. E.g: Bitcoin incentivizes miners to use a lot of energy.