Neal Stephenson, Cryptonomicon (1999). A sprawling hysterical-realist adventure techno-thriller that made me a bit sad, in a what-a-waste-of-enormous-talent kind of way. Although it did make me laugh a bit too. Perhaps the kindest thing you can say about its politics is that they dated rapidly? Bro? Anyway, the novel partly concerns the establishment of a kind of cryptocurrency, although it never gets the careful infodump treatment Stephenson gives to some other subjects. In general the presiding political economy of the book has a belligerent libertarian goldbug feel to it, though Stephenson wisely never quite commits himself. Trust goes a long way in establishing a currency, but eventually you're going to need something with intrinsic value, like shiny heavy yellow metal. (I'm exaggerating). Some of the bits that I enjoyed, from an economics perspective, include the long description of how it is possible to have some gold and yet not really have it (it's in the jungle, through miles and miles of geopolitics), and the final lines of the novel, in which a enormous cache of gold is literally dynamited into liquidity.