I concur…but then manipulation of global currency markets has been ongoing for a good while as well…which is probably how the crypto thing will/seems to be devolving. I was once on a barge on the Ucayali with my family, taking a cheaper, slower option to get from a to b which seemed a good idea at the time , and as a result was out of communication with the rest of the world for 7 days.
By the time I arrived at my destination, my available finances had been slashed by a third, because the AUD had dropped from over parity with the USD to about 0.66c.Within a week! If I had been at home it probably would not have had so much impact, but it had significant impact because all of my exchanges to the local currency were made with through/via the Yankee dollar.
Perhaps a little less extreme than the Bitcoin fluctuations of late, but nonetheless very real material impact which happens every day with government currencies.
Which speaks to @2disbetter’s point;
which could be said of USD (or any currency) once they become abstract numbers rather than an item of exchange/representation for an actual thing (gold for e.g.)
…but I also think the phenomena is fascinating