Bitcoin is, at the moment, the best attempt to solve the Bizantine problem: none could come up with a better solution.
From my point of view, it also solves a big current issue: privacy. That said, maybe it won't be the inventory of the century but could change how we perceive our financials!
Bitcoin is great, I won't deny that. At the same time I could think of at least 10 better inventions.
That being said, it is private, but not completely. If you dig a little and have some patience things can be revealed.