Digital art is very young but nevertheless its trends are very intensive. Some of these trends disappear as quickly as appear but some of them lay down for years. Some of the trends seemed a bit crazy but after the recognition of the leading designers and thousands of users we don’t find them crazy any more.
Due to Mark Abergel 2019 would be revolutionary for graphic design. One of them is complementary reality. It could be shown through graphics as non-verbal language for example visual images and so on.
More detailed about graphic design trends 2019 read here http://merehead.com/blog/top-graphic-design-trends-2019/ I believe graphic design will incorporate the complementary reality in 2019 and make it popular for a long time.
Bright design would be mixed with three-dimensional elements. Such a variation should become popular even in crypto sphere. It should even touch the ICO development but it isn’t easy to forecast the duaration of its popularity.
Graphic design would be focused on people. Advanced designers observe the design shift from product to the interaction and most of them are sure that this trend would be popular for a long period of time.
Of course all these predictions are relative, but they have some basis and could be realized indeed in the nearest time.