I have US dollar bill B03542754F in my pocket right now. I wonder about its "blockchain" and how it has flowed into and through our economy. I wonder if it at anytime in its life has been a part of illegal activity.
Source: http://rjcesq.com/?p=15
(Serious question; most of the regulatory activity I've seen has been pointing out to people accepting dollars that they are money transmitters)
This would correspond to abandoning a blockchain and moving to a new one in response to a big enough fraud.
Not when it's too far removed, but if it's a few steps down, i.e., cash given to a friend/relative, cash dug underground in a secret location and the loot found by someone else, etc - I believe it would be successfully siezed also in those cases.