No I think it just makes logical sense. The process of mining and the process of rendering graphics are both the kind of tasks that stand to benefit greatly from parallel processing, so it makes sense that graphics cards are optimized for both tasks. It's just a coincidence IMO.
Also I think the hardware industry would be perfectly fine without bitcoin/crypto mining. They have a lot of other massive and rapidly growing businesses like gaming, AI, etc.
For me, the hardware industry will boost this year because of bitcoin/crypto mining specially there are projects that combines cryptomining and AI technologies to blockchains and I hardly believe that in the near future, the blockchains are adoptive because of technological advancement in both hardware and software.