There are still more things to be considered in order to be the main streams this year. I think more years from now before it will make it happen. This is not a simple task to be done and not a joke to be made. This is a major decision for everybody.
There is no possibility of becoming into mainstream if still government won't give there support on crypto. Regularization and strict policy will give big help also for it as it become a basis of giving trust by investors, users and establishments open for room of crypto acceptance. May it takes years for that before it happen.