Why Vitalik believes quantum computing could break Ethereum’s cryptography sooner than expected

"In other words, he is thinking like a safety engineer. You do not evacuate a city because there is a 20% chance of a major earthquake in the next decade, but you do reinforce the bridges while you still have time."

This is exactly what every system worldwide using ecdsa and rsa encryption should be doing. For crypto, that is how we securely sign transactions today.

Upgrades need to happen. The risk, perceived or real, simply cannot be ignored.