Ethereum co-founder Vitalik Buterin has warned that by 2028, quantum computers could become powerful enough to break the security protocols (elliptic curve cryptography) underlying Bitcoin and Ethereum. In the tech world, this period is referred to as "Q-Day" (Quantum Day), representing a time when current protection systems could be rendered ineffective against quantum computing power.
This risk is taken seriously not only by individual experts but also by official institutions. For example, the U.S. Securities and Exchange Commission (SEC) recommends transitioning financial systems to stronger, quantum-resistant technologies in the future. Analyses by Deloitte also indicate that some cryptocurrencies could be vulnerable to this emerging technology, especially digital wallets with pre-exposed account information, which are more likely to be targeted.
However, experts stress that there is no need for immediate panic. Current quantum computers have not yet reached the level needed to break encryption on a large scale. Scientists and researchers are already working on new-generation "post-quantum" security algorithms to counter this threat. The crypto community is also aware of the risk and is taking measures to strengthen network security well before 2028.
