Indeed, it's mentioned.

When Mandibles was published Bitcoin was in the triple digits and the ATH was still $1166. Segwit hadn't been adopted, there was no path to scaling, the Lightning Network didn't exist.

I think the idea that Bitcoin would fail by 2030 was much more feasible at that point.

Now? Not so much.

I'm mainly just kidding around about leaving Bitcoin out. Imagining the end of the dollar as the default reserve currency and the rise of a BRICS currency is difficult enough without adding Bitcoin as a variable, Shriver does an excellent job with the thought experiment