20 years prognosis timespan is huuuuugeeeeeeee.
Typical strategic span for a modern company is around 5 years, I'm being told. Even smaller in IT and biomed.
Distributed currency isn't a company, it is a technological breakthrough. Talking about "the future of bitcoin" now is like talking about "the future of the internet" in 1995. The impact of bitcoin will be of a similar scale over the next 20 years, and we only have hints of what that will look like now. I was too young to buy a "piece of the internet" in 1995, and it wasn't clear which companies were going to last even if I had wanted to.
There's a similar situation now, and anybody who can see it coming would be foolish not to act on that knowledge to the best of their ability.