I think 'we' need the confidence of the larger public for a new major bullrun to happen again. Average Joe rushed into the cryptomarket in the final months of 2017 as making large profits appeared very easy and almost automatic, but many were severely burned financially as the inevitable crash happened. Seriously, I've seen some folks timing those 'buy high sell low' moments extremely well. Anyways, it'll probably take some time for the masses to work up the courage again to invest (gamble?) into crypto and thus initiating the next bullrun.