As someone who has been very fortunate financially, and who also has worked in the software development field for decades, I have had a genuine curiosity about the digital currency stuff. I've been on GitHub and browsed some code.
The financial advisory/investment broker/banking team that I use won't touch that market at as of this time. Too volatile. Too many significant unknowns.
Part of me at times has thought to buy a few Bitcoin just for chuckles anyways, but what has nagged me about this digital currency stuff is the technology appears to be more or less useless for somebody like myself. I have overseas accounts. I can already move money around easily. I can already use my credit card to buy anything, anywhere, in seconds.
Bitcoin isn't like the PC or the internet or the smart phone. It isn't a 'revolutionary' technology anywhere near that sort of level. If Bitcoin completely disappeared tomorrow (Price == 0.0), life wouldn't miss a beat except those who are directly working in that market or who sunk their life savings into it. Be a major news story and everybody have their popcorn out, and then most of us would move right on with our day. The total valuation of that market is still extremely minor to the overall economy. But if the PC or internet or smart phones all disappeared tomorrow...total societal chaos.
It has been over a decade now, at this point it would have been obvious if there was such a mainstream use-case. There obviously isn't. And it not having one is a large reason why I can't even convince myself to buy some just for chuckles. Mostly, it appears to be a digital casino/high-risk speculative stock trading/political statement/use it for money transfers to get around regulations and 'know your customer' checks because I'm maybe a shady individual use-case. I am not in that target audience, nor is a large percentage of the population in that target audience...so...some will win big, some will lose big, have fun in Vegas.
But still fascinating to watch. for me largely because of the tremendous amount of fraud and scams invited by the unregulated banking system layer that has grown on top of it...that has been fascinating to watch play out and no doubt will continue to be.