Or the silver markets [1]. Difference is the SEC doesn't protect Bitcoin exchanges [2]. Thus, while both roll back time in terms of the asset as a currency, only one rolls back the clock in terms of regulation. A loose analogy would be a cat-and-mouse game with primordial mice.

[1] http://opinionator.blogs.nytimes.com/2011/03/02/a-conspiracy...

[2] http://www.lextechnologiae.com/2011/06/26/why-bitcoin-isnt-a...