According to Spanish newspaper of record, El Mundo, much of the media used to promote Catalonia’s October 1st (O-1) referendum to secede from Spain was paid for in bitcoin. O-1 passed, but not before the entire affair was deemed illegal. The country’s more than a century and a half old, and highly respected, law enforcement agency, Guardia Civil, is alleging O-1 leaders used the world’s most popular cryptocurrency as a way to hide related expenses from Madrid.