It makes money laundering harder for low and intermediate level drug dealers. Netherlands is a major importer for drugs: Amsterdam, Rotterdam, and Hamburg are major ports for drugs. Drug wholesalers in EU would rather transport millions of euros abroad, and use these euros in Africa in order to buy gold and other metals from locals. All of sudden, one ends with gold, sell gold back to refiners and get paid with bank transfers. It is a trade based money laundering. What the West want is to abolish cash everywhere across the world, it is an impossible goal. Even if Zimbabwe wants to abolish cash and use digital transactions, ordinary Zimbabweans don't want to participate in that.