Bitcoin will change a lot more than finance. It could also change how software is built and upend a bunch of today's biggest web companies and Bitcoin was designed this way to make sure that the same Bitcoin, which has no physical form, isn't spent twice by the same person.
Bitcoin is money. And Money can change everything. A few years from now, we can't imagine how can we rely on bitcoin too much because bitcoin as a digital cryptocurrency can change or even rule the world, i mean, money makes the world works.