According to those 2 charts there is a clear correlation between price and Flux network hashrate. Now put into the equation the GPU miners transitioning to other POW coins after the Ethereum-merge
Ethereum Mining GPU Hashrate Performance Roundup
Ethereum Mining GPU Benchmark | TechSpot
Ethereum GPU Hash Rate Drops | OC3D News
Ethereum Mining Hashrate in 2020 – Еvery GPU tested / 5700XT/2080Ti/2070 etc. - YouTube
Best Ethereum Mining GPUs - A Benchmark And Optimization Guide [Updated] - Page 2 | HotHardware
Secondary Market GPU Pricing in Downtrend, Better Times to be a Gamer May be Ahead | TechPowerUp
How to Optimize Your GPU for Ethereum Mining | Tom's Hardware
The Best Graphics Cards for Crypto-Mining in Early 2021! | Computer Lounge
BTC hashrate ATH, the ETH Merge, and GPU mining being reshaped | f2pool
Best Ethereum Mining GPUs - A Benchmark And Optimization Guide [Updated] - Page 2 | HotHardware
The Block: A look at the trends driving down GPU prices — and what this means for Ethereum miners
How to Mine Ethereum and Ethereum Classic on 4GB GPUs - Crypto Mining Blog
GPU mining could eventually be profitable after Ethereum moves to proof of stake
GPU price to Ethereum price comparison graph : r/Amd