The rational case for bitcoin and cryptocurrency investment

[Crypto Strategos]

What do you guys think is the rational case for bitcoins and cryptocurrency investment in general.

I think it is the overall size of the market compared to other markets gives great capacity for expansion. I have made a video discussing the reasons why.

https://www.youtube.com/watch?v=JnPb2h6qO98

What do you guys think? What, apart from bubble dynamics, do you think is the real rational case for cryptocurrency speculation?