Dan, I don't know anything about cryptocurrency except the word bitcoin et al.
However, I do have a prejudice here, because just about anything done by Amazon or Facebook or Google, or Apple/Microsoft or the Big Five mega-news corporations or ExxonMobile or just about any multi-national corporation, well, I tend to be pre-biased against it.
I did hear on the news they are giving FB a difficult go of it.
(Sigh) ...and now I will go put in my latest order to amazon.com...