I think the response for the advent of quantum computing cracking security will cause us to create "quantum encryption" or something like that. In this case, the technology that is disruptive to security will also be our saving grace shortly after. To put this into perspective I ask, "what came first, a computer virus or Antivirus Software?"
RE: [Quantum Computer & Blockchain Security] Chapter 3. Janus-faced quantum computer Quantum Parallelism and Quantum Communication Security