For transactions that exceed these limits, customers are advised to either see if there is an Abra Teller in their area who can facilitate a larger cash transaction, or else find a suitable bitcoin exchange, brokerage, or OTC market that supports larger purchases using a bank account. More than money For all of the reasons outlined above, Bitcoin represents a fundamental shift across a number of fields including finance and computer science. Image courtesy Wikimedia Commons Bitcoin miners have a strong incentive to produce blocks that follow the rules of the Bitcoin protocol. This centralization creates a massive attack surface for hackers or thieves. There are a lot of reasons why the price could go down — including future government regulations, a discovery of a bug or vulnerability or some other security breach , the emergence of some kind of competitor that is a vast improvement to Bitcoin, the erosion to the incentives like mining fees to continue to maintain and upgrade the netwo...