Honestly, I didn't know what made the crypto market decline like this, but one thing I can conclude is that this decline began when the fork bch happened.
Before BCH fork happen we have already in the dips and it only added the declining scheme of the market. There is something more than this which could make this market falling so hard and we can't tell it now.
I think there are just 2 possibilities, whether its because whales want to accumulate or because people are just tired with the bear market.