crypto is completely different in this respect
jp koning has a nice little blog post about this distinction here:
http://jpkoning.blogspot.com/2021/07/the-dollar-isnt-meme.html?m=1
The dollar-as-meme claim is often made by cryptocurrency enthusiasts. That this idea would emanate from the cryptocurrency community makes sense, since cryptocurrency prices are a purely meme-driven phenomenon. There is no cryptocurrency for which this is more apparent than Dogecoin... but it applies equally to Doge's older cousin, Bitcoin. The harder you meme the higher a cryptocurrency's price...
And so for cryptocurrency analysts, getting a good understanding of a given coin's value is a matter of picking through its underlying memes and meme artists.
But if cryptocurrency analysis is ultimately just meme analysis, what sort of analysis applies to dollars?
Dollars issued by banks are secured by the banks' portfolio of loans... And so they are subject to credit analysis, not meme analysis. An analyst appraises the quality of the bank's investments in order to determine the soundness of the dollar IOUs the bank has issued.
As for central banks like the Fed, they are just special types of banks... and so the dollars they issue are also subject to credit analysis.
The idea that the money issued by central banks—so-called fiat money—is subject to the same credit analysis as any other type of debt security is a point I've also made on this blog. There are certainly some odd features about Fed dollars or Bank of Japan yen, but ultimately they are just another form of credit