The XRPL community is recently promoting the Amendment 420 proposal, which aims to add an optional single-use Secret Key mechanism at the protocol layer—simply put, a new set of keys is generated for each transaction to drop the risk of long-term key exposure. Meanwhile, Casa co-founder poured cold water on the idea, bluntly stating that Bitcoin's quantum resistance upgrade will take at least 5 to 10 years to complete.

The community is in an uproar. One faction believes that the quantum threat has been exaggerated, while the other believes that the risks are seriously underestimated. However, upon closer inspection, the technical solution itself is not the main difficulty; the real bottleneck lies in coordination.

Imagine this: Quantum-resistant upgrades involve wallet providers, hardware vendors, exchanges, miners, and custodians. Each of them is thinking the same question - can I wait for others to act first, and not be the easiest target for attacks? The optional protocol layer of XRPL is precisely aimed at lowering this migration threshold; however, the situation with Bitcoin is much more complex, as a soft fork for global consensus means costs rise exponentially.

Interestingly, the market prices quantum risk at a pitifully low level, but the upgrade costs are real money. The most practical defensive strategies now are twofold: try to avoid address reuse, and use more secure scripts and multi-signature custody solutions for heavy asset allocation.

In short, don’t rush to all in one direction; this matter is not as quick as you imagine.