CipherTrace just published their Q2 Cryptocurrency AML Report and found it interesting that Bitcoin still reigns king in dark markets and cybercrime. Most people associate privacy coins even just 4% involve Monero.
Even in the case of malware and ransomware, ETH used in only 1% of instances and BTC used in 98% of cases.
https://ciphertrace.com/q2-2019-cryptocurrency-anti-money-laundering-report/It should be noted that the fact that they are operating there does not mean that everything is for crimes or bad things, the site is very diverse, one of the reasons why Bitcoin sometimes rises in December is because the demand increases in the DeepWeb , and it is because they make many purchases, but currently this increase may be given to ensure anonymity and privacy.
Monero is a currency that is impossible to track and in the DeepWeb or dark market there will always be quick solutions to the complications offered by some traditional markets while maintaining privacy.