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Hint #1: Five keywords will become a 64 digit hexadecimal number through various transformations.

We need more hints, with those ones still difficult to solve it.

Five keywords? Bitcoin, Vitalik, Buterin, Ethereum and CPD? Anyone tried transforming these to 64 digit hexadecimal number?

Transform how? Write them side by side and perform SHA 256 on the whole? That's not giving us the private key. Cry