Yesterday, I came across an interesting analysis from Grayscale about quantum computing and cryptocurrencies. The point is that Google Quantum AI published data that makes the industry think about the speed of quantum technology development. It turns out that progress may not happen gradually but suddenly, in a leap. This creates a problem for blockchain projects.

The whole story started with the work of Peter Shor — his algorithm showed that quantum machines could theoretically break modern cryptography. While such computers do not yet exist at scale, the path to them might be shorter than we thought. Researchers say that 1200-1450 logical qubits are enough to challenge current encryption systems. That no longer sounds like science fiction.

Here arises an interesting paradox. Blockchains update more slowly than traditional companies because they require consensus from the entire community. This makes them more resilient in the long run, but if a quantum leap occurs suddenly, networks that are unprepared could fall behind. But here’s the point — a solution already exists. Post-quantum cryptography is not the future; it is already a reality used to protect internet systems.

The most interesting thing is that some projects are already moving in this direction. XRP Ledger has started experimenting with post-quantum cryptography, as has Solana. This shows that the transition is already underway. XRP Ledger, by the way, is one of the first to seriously implement it. Technologically, it’s clear — blockchains need to adapt post-quantum cryptography; it’s a mature discipline with ready-to-use tools.

But not all networks face the same risk. Bitcoin, for example, uses the UTXO model and Proof of Work, which reduces certain vulnerabilities. Although Bitcoin has its own problem — how the community will handle lost coins. This is not a technical issue but a matter of consensus.

This also highlights the difference between centralized systems and blockchains. Banks can respond quickly because management is centralized. Blockchains depend on the agreement of all participants, which slows down the process. But that’s their strength — they are more resilient. Currently, there is no urgent threat, but the direction is clear. XRP Ledger and other projects are preparing in advance, and that’s the right approach.