I think it takes time to understand what will happen to the cryptocurrency as a whole. Startups that were released on the platform and shot on the "HYPE" are now simply not in demand. Companies that really need development now sell Ethereum, as they need Fiat to rent offices, pay staff, and so on.
It is because crypto is really anonymous and nobody actually knows what will happen next but we can make predictions such as price will be high or low, people who are holding will surely win but selling now is really not good better use bitcoin to pay your bills and to get staff because if you will sell it is not time to do so, ETH is also not at high price to sell I think waiting till end of 2019 is good decision to have profitable selling.