We've passed the first "mainstream barrier", which imo is news/media appearance. Those have been (with regulation) the biggest newbie scarers of 2017/2018. Now, we're going for the beginning of the mainstream adoption. This step might take more than a year (even though i don't think so, we've all seen how 2017 went). Hopefully, BTC will get back on its feet before new updates like the Lightning network, so that those boost it even higher above 2017's clouds!