Easy manipulating this to their benefit and none of you seem to take issues with that ?
Have you considered that the miners perhaps could actually believe in the blockchain and can see as clearly as you have pointed out and knowing how the difficulty works are acting on their own accord, in unison, for the benefit of the chain?
Does it scare me that people who might share a vision are working towards that? Is this your question?
So every miner in the entire world all came to the same decision at the same time
What's to say the user's won't get sick of this yo-yo effect and just start dumping making this worthless and the miners just give up for good you don't know what there thinking.
How would you feel going to the bank to get some money and they turned round and said sorry we are withholding all withdrawals because the interest rates are down that's essentially what there doing holding your money because they don't want to mine just yet