Now it is becoming a mainstream. We can easily see the process going on as more and more people get to know about cryptocurrency each day. The crypto has implemented itself in the most popular spheres: Television, Youtube, Gaming and others.
Yes crypto became mainstream right now and even a year ago we can't imagine how many people will know about crypto. A couple year ago crypto was a toy for a geeks, but now I see more and more news about crypto and how people and companies try to adoption crypto, blockchain and other things in real life that people can use it.