Yes I noticed that too. And yes it could be the start of the end.Is this a start of an end of mining trend?
What might be the reasons?
But nobody can be sure yet. A few reasons I can list:
That crypto bill created some hype that mining/crypto was going to be banned. Some miners might have realized how volatile or fickle their earnings are, so to still be in profit they might be selling their rigs while they still get good money for their hardware.
Others might have seen the downward trend in BTC/ETH prices and just like you and me, might have thought it's better of to leave now than having to sell at fraction of a price later. Again, almost the same thing.
Yes mining profits will go down once 'the merge' finally happens in 3 months (hopefully) time. So better now than later I guess.
It could be a start of a flurry, only thing that can make it a flurry is continuous downward trend + hype of crash + better availability of LHR GPUs + patience from buyers (gamers) + better availability of consoles (results in lower number if potential buyers for GPUs and when miners see posts of people happy with their consoles and saying they don't care about GPUs, it creates a small feeling of fear in their minds, trust me) + more people selling their rigs + some influencers like Son of a Tech creating a video stating how entering the mining business now won't mean return of investment before ETH2.0) among other things.
All we can do is hope.