Okay AI breakthroughs are really computing breakthroughs. So a quantum compute breakthrough would undoubtedly lead to an AI golden age. 

If AI could replace substantial human labor (coding, writing, management, bookkeeping, etc) it would need to transact in hard digital currency that is finite and immutable. So usage and value accruing to bitcoin would increase by multiple orders of magnitude. And at the same time much of humanity would be way more productive and prosperous with AI at their disposal.

Just need a quantum resistant algorithm securing bitcoin.