>The purpose of blockchain is to solve what happens when neither side of a transaction trust the other. Normally the courts solve this problem, so this is only

>The purpose of blockchain is to solve what happens when neither side of a transaction trust the other. Normally the courts solve this problem, so this is only an issue if one or both parties are operating outside of the law. Which, for normal financial enterprises trying to do business, creates regulatory problems: Chase can't exactly transact with the PLA without getting bulldozed by regulators, and you can't exactly hide the transaction on blockchain (since its immutable). In the scenario you describe, there are ways of cheating even in blockchain (51% attack), and there are ways of solving the issue outside of blockchain (military force, embargos).