The truth is that the anticipation for crypto to go mainstream increases as time goes on. In fact there are skeptis who would have nothing to do with crypto unless it goes mainstream. Is 2018 that year when blockchain crypto goes mainstream?
The fact is that bitcoin is already popular before 2018, the last two years have become the era of bitcoin because its value reaches the peak unexpectedly. This event increases people's interest to enter the bitcoin market and hopes that the same cycle will be repeated in 2018. I have observed that the development of the bitcoin investor population in 2018 is very rapid when compared to 2017, bitcoin is becoming mainstream in the world, even when we explore the internet many advertisements explain about altcoin promotions, ICOs and all things related to crypto.
If the prediction that the end of 2018 bitcoin prices exploded again is true, then there is no doubt that most of the world's population in 2019 are already using bitcoin.