Before we head into the technology, why is Bitcoin attractive. From an economics perspective, real simply if you have a finite static resource that cannot expand (i.e. Bitcoin) you can set and evaluate its price and purchasing power. You’d think gold is a finite static resource but new gold is continually found and mined so gold is an expanding resource. Even more elastic is paper money when countries print money without a gold backing. Obviously if there is more paper money distributed among a population, its value and purchasing power are diminished.