For one, I think blockchain technologies will in many cases be invisible. Embedded in the infrastructure of process and operations so it won't necessarily require 'activation' on our part. Still, there will be applications that require us, as consumers, to engage with this new tech and I think the older folks are like any other 'older generation'. Some will embrace while others will choose to not participate. My mother's a perfect example. She has a smartphone, but willfully remains ignorant of the features on the device. She takes pride in her lack of know-how; and that's effectively ended her career in real estate (which was a glorified hobby anyway). Meanwhile, my father is on top of all things tech. He loves it.
I think some people just have a more difficult time making the adjustments and accepting the new paradigm than others. Age has something to do with it, sure. But there's concern for those who choose to lag behind. They may be left out of the economy entirely if they're not willing to even be curious about what's on the horizon. I'm not futurist, but I do wonder what will happen in this case.