There are some fringe benefits for blockchain but massive issues with normal human issues like:
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Scams/theft: person has the wallet lost through scam or left, how do you invalidate the lost credentials or tickets.
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Wallet loss: loss through any number of means: fire, incompetence, computer being destroyed, loss of account to cloud backup etc
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Issuer need to invalidate: if tickets/credentials were purchased by fraud or an issue occurs where they need to invalidate
How does blockchain handle these common situations?
I have a recursion joke. Re-read this for the punchline.