It's a good example.
Every thing is in development.
Internet and telephone make the communication easier for people all over the world. But postal companies still exist. There are many works they do.
Also, bitcoin can make the transactions easier for people. But banks will exist forever.
I agree to this bro, if cryptocurrency and email or technologies developes i think it'll not kill bank and postal industries or anything. They will still be part of the world. That comes the point where humans make profit upon the service of technologies such as AI cryptocurrency and stuff. The point is manpower is still needed and can cowork intechnology.