Bitcoin investors are facing fresh concerns over a future security threat linked to quantum computing. Experts warn of a risk known as “harvest now, decrypt later,” where attackers collect encrypted data today and wait to break it in the future.
The warning comes as institutional interest in Bitcoin continues to grow. BlackRock’s iShares Bitcoin Trust now holds about 764,893 BTC, which is roughly 3.64% of Bitcoin’s total supply. This large concentration has renewed debate over security and key management.
Researchers say most cryptocurrencies rely on Elliptic Curve Cryptography, or ECC. While ECC is secure today, it could become vulnerable if powerful quantum computers are developed. These machines may one day break current encryption methods.
Under the “harvest now, decrypt later” strategy, attackers store encrypted blockchain data now. Once quantum technology matures, they could decrypt old transactions and keys. Analysts say nation-state actors are already preparing for this possibility.
At the same time, Bitcoin trading volumes are rising. BlackRock’s IBIT has seen strong daily activity, even without sharp price drops. Market observers say this suggests Bitcoin is moving from retail holders to large institutions.
Some blockchain projects are trying to address the risk early. BMIC, a security-focused protocol, says it is building post-quantum wallet tools. Its system aims to hide public keys and reduce exposure during transactions.
BMIC claims its wallets use smart account technology that avoids seed phrases and limits key disclosure. The company says this could help protect funds against future quantum attacks, though these systems are still new.
As Bitcoin’s market value approaches one trillion dollars, pressure is growing to modernize its security. Analysts say the industry may need to shift to quantum-resistant cryptography in the coming decade to protect long-term investors.
