http://uk.businessinsider.com/bitcoin-price-traders-angry-over-mt-gox-trustees-bitcoin-sales-2018-3
That seems to cover a lot of it. But the basic summary is that the BTC recovered from the mt gox catastrophe a few years ago is being sold off and potentially aborting every price rally for a good while. Its difficult to get any clear info on how much is legally required to be sold and what happens to the rest afterward.
Oh boy sounds epic