Bitcoin is perfectly fungible. Anyone who claims otherwise is confusing economic concepts.
we already had this discussion.
maybe bitcoin is technically fungible (because any coin can always be send an mixed) but practically you have problems when using coins which where stolen (eg bitstamp hack) or why do you think new minted coins are sold with a premium?
Here's an economic concept: the market places a 10% premium on freshly minted zero-taint BTC over 'gently used' coins. Good luck with your stolen Evolution coins!
Bitcoin doesn't meet the highest 'can't be evil' / 'can't be non-fungible' technical standard because the code may be modified with black/white/grey/red lists of forbidden/allowed coins/taints.
So no need to even get into the more significant (but more general issue) of socioeconomic interchangeability.
Sorry but that doesn't make any sense. The lists you speak of arbitrary human concepts. A USGian parasites kangaroo court AML/KYC bullshit.
I am confident I could trivially sell stolen Evolution coins on most p2p markets in major international cities today. Only fiat businesses such type of lowly scheme. They are a sham.
Don't let anyone ever tell you your Bitcoin is not as good as another. Individuals currently pay a premium on market because of a lack of private alternatives against traceability. This is a technological problem that will certainly be solved seeing the progress being made. When we do get there anyone still entertaining this notion that Bitcoin is not fungible will surely be looked at in a funny way and any money spent on "clean" coins will be money wasted.
http://trilema.com/2014/guidance-there-is-no-such-thing-as-bitcoin-taint/If they don't accept your bitcoin because it was linked to a scam, that's the way it is.
There is such thing a as bitcoin taint because what if I choose not to accept bitcoins coming from the bitcoinica theft? One example of showing how fungibility does not 100% exist is enough to break your "perfect fungibility" claim.