I have been paying attention to much of what you've been saying, and yet I am not sure I understand what the purported BTC fungibility crisis is, and why, e.g., the recent FBI auction does not set a strong precedent for fungibility.  Time permitting, could you please explain a bit?

Also, just for fun, in case those interested have not read this nice paper on the history of fungibility: 'Banknotes and Their Vindication in Eighteenth-Century Scotland'.  http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2260952