Picture a locked box that anyone can see, but only you can open with a special key you keep hidden. That simple idea powers the security of nearly every cryptocurrency wallet, bank transfer, and secure online login today. A new 110-page analysis from Project Eleven warns that this everyday protection could crumble within four to seven years under the weight of an entirely different kind of machine: the quantum computer. The report, titled The Quantum Threat to Blockchains - 2026 Report, maps
