While i can say that i agree on some of your statements back then, I don't think that it is still the same case nowadays. Because you see,  a lot of criminals back then really thought that bitcoin was dead on anonymous and used it for transactions benefiting their criminal activities. But after a few years, the authorities found the flaws of the bitcoin's security or anonymity.  And found ways to track criminals. Which is why criminals today are now switching to other cryptos and the most famous is monero.