Ledger technical director Charles Guillaume warned that the development of quantum computing could lead to the emergence of several competing Bitcoin hardforks. Transitioning to post-quantum algorithms is inevitable, but the different protection options have significant trade-offs: some critically increase signature size and reduce network bandwidth, others disrupt familiar tools such as multi-signature.

The failure to reach consensus in the community will make it difficult to choose a common safety standard. Guillaume is confident that the resulting standard will define the market: liquidity, miners, Castodians, and exchanges will favor the chain they trust in the face of a quantum threat. It is she who will be the "real" Bitcoin.

The top manager called the main risk too late to start preparations for a "quantum day" (Q-Day). Earlier, Project Eleven experts estimated that the moment when quantum computers could crack Bitcoin’s cryptographic protection could be as early as 2033, making the issue of migrating to new algorithms critically urgent.