Bitcoin is not "mathematically designed" to withstand regulation. The mathematical aspect of the system involves only its technical operation; it's designed to

Bitcoin is not "mathematically designed" to withstand regulation. The mathematical aspect of the system involves only its technical operation; it's designed to avoid certain classes of technical attacks on the system. If anything, it's more amenable to certain types of regulation than cash is—paying someone in cash doesn't make an entry in a public blockchain.