The answer
Not necessarily. Current research generally treats elliptic-curve transaction signatures as a more direct quantum concern than mining hashes.
What to do next
Distinguish Shor-style signature attacks from Grover-style search speedups.
NIST post-quantum standards
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Trezor hardware wallet
A current-generation hardware wallet for managing keys; it does not make Bitcoin or Ethereum quantum-resistant or resolve a future protocol migration.
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