This author incorrectly believes that money-laundering methodologies are mutually exclusive to each other.
Yes, cryptocurrencies can be used for illicit purposes... just like traditional banking systems, money service businesses, payment services, and the vast list of tools available to the money-launderer. What is missing from the author's superficial analysis is the fact that Bitcoin and similar products are in many ways more traceable and easily monitored in near-real-time than fiat currencies.
Frankly, licensed crypto platforms in the US and EU are generally proactive with regards to money-laundering prevention and compliance through advanced customer and transaction screening methods, limitations on volume and types of transactions, and due diligence processes.
With regards to the author's concern about the market cap increase of cryptocurrency, here's a single example of the real scaling risk of moneylaundering: Crime gangs, terror groups may be laundering billions of euros via EU banks: Europol
"The agency revealed that transactions highlighted by just 10 national financial crime units had involved a staggering 178.8 billion euros (S$288 billion) in 2014." That happens to be larger than the ENTIRE market value of the cryptocurrency market.
Sure, cryptocurrencies could be used by all sorts of lovely people for all sorts of lovely things. But shadow, unregulated currencies can also be used by say, tax evaders, drug dealers, money launderers and other criminals. Oh, yeah, and terrorists. Who’d a thought it?