Andrei O.
@andrei0x309
It depends on the blockchain, there are some(albeit in the minority) that support private data eg: Secret Network. Plus a lot of scammers just send encrypted data to cheap blockchains for data exfiltration. Also in most cases, you can make some data not permanent(still public) even if the history of the transactions/actions in most cases is permanent or at least held for a very long time.
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