Re: Eventually the FUNGIBILITY issue of bitcoin will make headlines ...
Your friend Alice gives you two $10 bills. One is good, one is bad. You take both to buy a $20 T-shirt. Now what?
You set up a JoinMarket to automate the process, then profit.
Use the two $10 bills where both shows up as good ones. I mean not all jurisdictions will use the same regulation.
Pretty much.
It only takes a couple of business opportunities lost to a competitor for a "merchant" to think twice about this whole blacklisting shenanigan.