...
I have been wondering over the past few months about the fungibility of Bitcoin now that blockchain analysis tools from Chainalysis and others. As an example, it might be hard to get FIAT$ from some exchanges with BTC with "taint" from mixers or traces back to use in dark markets.
If the exchanges crack down on those who want to cash-out of BTC that is "dirty", then IMO that makes BTC not perfectly fungible.
Well, the gold market at the wholesale levels works somewhat similarly. The LBMA (the world's largest physical gold custodian) carefully tracks the gold bars it holds, and even allows into the system. It is very hard to get gold of uncertain provenance ("dirty" gold) into the LBMA system.
The below article explores this, and hints that we are almost there re a hierarchy of gold and BTC (dirty gold and dirty BTC are worth less):
https://www.coindesk.com/bitcoin-gold-staying-cleanEDIT: The article suggests this is more of an issue at the wholesale levels (institutional investors, etc.)
The thing is when you receive Bitcoins you won't look at the whole history , geography and civics of that particular fella
what you have is : Bitcoins
From where : For most of the people it doesn't matter.
_*_
Plus how would they know from where they came from until and unless the person who is holding them agrees to provide the wallet history and so on ... You would have to track a lot more before you get to know that it's very time consuming+ hard and nearly impossible. (There is a reason why we have FBI
)
_*_
These KYC enabled wallets usually are connected with the bank accounts and which directly point towards the person in question , therefore this might have been easy to do for the companies but for a normal person it's as hard as a job as any.
_*_
At the same time the Virgin Bitcoins which have been mined and does not have any print of anyone , do sell for worth more in the markets. The miners charge more for them .
Therefore I do believe this might happen, the dark coins being sold for less , but who would want to end the inquiry of a CBI/FBI/police right at their door step ?
It's like the fiat argument as well, that every US dollar has traces of cocaine on it. So if people started to use any analysis on any taint, then we're all holding Bitcoin related to crime, or casinos, or exchanges. I think the problem of cracking down only exists with DIRECT linkage to criminal activities, for example withdrawing from known dark market wallets to an exchange.
In terms of Physical cash we cannot always do anything regarding that , we sure have to numbers written which is different for everyone but at the same time you cannot do that , check each and every person in the city for a dollar they might be holding which dates back to a murder in 2000!!
That is why corruption will have a hard time with Bitcoins.