[Covzire]

AS I understand it, Quantum computers as of yet are only useful for a relatively small set of obscure operations. They're extremely fast of course, but they're not a drop in replacement for basic gate operations that classical computers and their crypto algorithms use. A cryptocoin like bitcoin uses multiple algorithms making them an exceptionally difficult problem to program a quantum computer to handle. If you ask me, we'll hear about Quantum computers breaking a lot of other things before they get to crypto coins.