The rise of quantum computing has sparked concerns about the potential risks it poses to legacy blockchains. However, experts believe that XRP's architecture makes it better equipped to withstand these threats than Bitcoin.

XRP operates on the XRP Ledger, a decentralized, open-source blockchain that facilitates cross-border transactions. To understand why XRP might be more resilient, let's delve into the details of the quantum threat and how it affects both XRP and Bitcoin.

The primary vulnerability stems from the fact that a powerful enough quantum computer could potentially reverse-engineer a user's private key from their exposed public key, thereby draining their funds. Typically, a user's public key is exposed when they send a transaction, but not when they receive funds.

This means that account activity, rather than balance or the age of the address, is what makes users quantum-vulnerable. A recent audit of the XRP Ledger found that around 300,000 accounts, holding approximately 2.4 billion XRP, have never sent any funds and are therefore quantum-safe by default. In contrast, Bitcoin's blockchain is more exposed due to its sheer scale and the fact that a significant portion of early bitcoin was mined using a format that directly exposed public keys. This includes Satoshi Nakamoto's 1 million BTC, which has never moved.

Google estimates that about 6.9 million BTC are vulnerable, equating to nearly 35% of bitcoin's circulating supply. XRP's key rotation feature and escrow functionality provide additional layers of protection against quantum risks. The key rotation feature allows users to swap their signing key without moving funds, while the escrow feature uses time locks to prevent withdrawal until a specified time has passed. Although Bitcoin developers have initiated proposals to develop quantum resistance, the lack of a key rotation feature leaves holders with limited options to protect themselves.

In conclusion, while both XRP and Bitcoin face quantum threats, XRP's unique design and features make it less susceptible to these risks.