2018? I don't think that we can go mainstream right now because of too much regulations going on around the world. Government as constantly at looking ways for people not to go to crypto so I doubt that it will happen this year. But I believe that we can go mainstream, but not this year though. Maybe it will take another 5 - 10 years before we can see people from all over places using their bitcoin as some mode of online payment or buying stuff in the internet thru bitcoin. Right now its not happening.
Yes, I agree with that. 2018 is not a year for crypto goes mainstream. Because of many regulation that are not legal in the other other country. There are also many government that are anti of bitcoin. There are also many things to be fix in the cryptoworld. So that it is easy to use in many transaction. Also in this year, there are many ICO project that are not successful in their campaign.