The answer
Current phishing and seed-compromise attacks are active, whereas public cryptographically relevant quantum attacks on Bitcoin or Ethereum are not known.
What to do next
Prioritise existing protections and monitor credible post-quantum updates over time.
Bitcoin.org wallet security resources
This resource helps with the question, but is not presented as a commissionable partner.
Visit Bitcoin.org wallet security resources ↗Useful research or product resource; no affiliate status assumed.RELATED PRODUCT OR SERVICE
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.
Explore Trezor hardware wallet ↗Official website; affiliate programme available to apply for. No tracked link or partner approval yet.