All I could think about is how they will be connected industry-based? When the oil is used for energy, it's possible that it could be used for powering up the mining farms and it is somehow connected, so when oil prices go decreases, energy will be cheaper. More Bitcoin will be kept and saved in the miner's pockets. It could also be connected when they accept cryptocurrencies as their payment.

https://www.pymnts.com/blockchain/bitcoin/2020/plunge-in-oil-prices-triggers-crypto-sell-off/

It has some effects on the current situation that we have with the Covid-19. It can be a coincidence or not but it has something to do with this for sure.