I'd imagine the bitcoin mod would trigger on 'break emerald ore' in the world, and that a flag would be set upon 'place emerald ore' to prevent silktouch from causing it to be fired more than once.
Parent comment is not talking about using silk touch picks to retrieve the ores and then using fortune picks to mine those ores -- and there's no reason to stop that behaviour.
Villagers trade items for emeralds. It's possible to trade paper for emeralds. The game limits the amount of paper that can be traded, but the game misses a single option which means that it is very easy to get huge numbers of emeralds.
