I think the bear market will be mostly over by summer 2019. The next mania phase will probably not begin until summer 2020 but we may see new ATH's in bitcoin in 2019. The last quarter of 2019 will probably be the turning point. The next mania will be as much greater than 2017 than 2017 was above the mania of 2013.

These are really attempts at mass adoption, but the technology isn't there yet. Crypto is like email once was before windows had sockets/drivers for internet connections. You had to download a winsock driver and know how to install it to connect to the internet back in the days before windows 95. I did this once on a windows for workgroups machine version 3.11 in early spring 1995. Later on it eventually became plug and play.

Crypto will achieve mass adoption at this rate well before the year 2030. Sometime in the early 2020's I'm expecting the failure of national fiat around the world due to the equity drain created by crypto. The 3rd world is already jumping in.