$DASH It was called "darkcoin" back in its early days because it was used to purchase stuff from "dark web" and was almost banned forever but later they changed its name to digital cash and announced that it will not be used as a form of payment in "dark web" services anymore. However, due to its privacy preserving nature, the transactions cannot be tracked and thus raising concerns about it being used for transactions in criminal operations which is why it might be banned in some countries. EU is already in process of making such decisions considering privacy coins in case crypto gets adopted more broadly.