@ben_mallah Trust. It's also about trust. The more legitimate institutional investors get involved the more it becomes trusted as an asset. It is still a risky volatile investment at the moment. But like any investment the more risky the bigger the reward (or loss)
@ben_mallah Scarcity. There are only so many bitcoins in existence. The more people own and want to own the higher price. It's like baseball cards etc. Scarcity was built in from the beginning.