I don’t think it’s a straw man, it’s only directed to the point that both have no intrinsic value and are dependent on the mindset/agreement of those giving it value.
Currency that Germans agreed had great value in 1920 was used for kindling and as kids’ playthings in 1923, that of course is just one of many examples of currency going worthless.
Again, it is of course not predictable, but I don’t believe in the long term viability of Bitcoin, or any other cryptocurrency outside of the complete control of the Govt., long term. It’s competition and the Govt doesn’t like competition.
People who believe Bitcoin is “out of the reach” of Govt are IMO kidding themselves. The Govt has unlimited power, which is only growing daily.