No sci-fi writer predicted bitcoin mining. The rulebook vaguely stated that a cyberpunk knows a few unlawful ways to get money, so should a game such as Cyberpunk 2077 include a subplot based on simply publishing images bugged with Monero-generating code (to use just one recent example)?
Also, a friend of mine has an idea that the first true unkillable AI will run inside a blockchain, and it would be economically infeasible to hack it as it would require owning more than 50% of its infrastructure. But that's still sci-fi.