In 10 years from now a quantum computer will have sufficient computation power to give a 51% attack on the bitcoin network.
Please discuss.
Well, technical progress does not stand still and this is quite normal. Specialists have a full ten years to solve this problem. Undoubtedly, there will always be a way out, but from such power of quantum computers there will also be a benefit: it will be possible to recover lost keys from bitcoins and other cryptocurrencies.