Blockstream CEO Adam Back has dismissed concerns about quantum computing posing an imminent threat to Bitcoin's security. Addressing a Bitcoiner VC's claims, Back emphasized that the potential risk from quantum technology is still 20 to 40 years away. He clarified that Bitcoin's security is based on digital signatures rather than encryption, suggesting that current technological capabilities do not present a real threat. Back cautioned against exaggerating the issue, highlighting the importance of focusing on realistic long-term security measures for Bitcoin.