The problem is that BTC price is not rising in relation to difficulty increases as it should be.
It shouldn't be linearly rising. This is going to be a very complex process including many other factors. You will see it rising with the next financial crashes, considering it is a safer bet than some other notions. Like it has happened before.
Every crash left it higher and higher. And financial crashes always come. That is a given.
Ye that's exactly my point also. its going to go up if its going to be successful so any questions about value of equipment are only relative to how long you are willing to invest in BTC for. The risk is the complete collapse of it. Also people who have the equipment to sell want to make their profits now because they feel like their previous risks should have paid off by now are unsure of the future like everyone else is.