One possible comeback to the "Man in the middle" vulnerability is that Bitcoin uses strong encryption to protect against this type of attack. The public and private keys used in Bitcoin transactions are generated using complex algorithms that make it extremely difficult for a third party to intercept and alter the message.
Additionally, Bitcoin users can take steps to further protect themselves against this vulnerability, such as using a hardware wallet or multi-signature transactions, which require multiple parties to sign off on a transaction before it can be completed.
However, it's important to note that no system is completely foolproof, and there is always a risk of vulnerabilities being exploited. That's why it's important to stay informed about the latest security measures and best practices for using Bitcoin and other cryptocurrencies.