Currently, the ratio of legal to illegal activity on the bitcoin network has completely changed trend as the former surpasses the former. This was stated by DEA Agent Lilita Infante at the U.S Drug Enforcement Administration.
Is the number of criminals on the bitcoin network has significantly reduced compared to early days?
https://coinpedia.org/news/bitcoin-network-speculators-not-criminals/Speculators are the players of the Bitcoin market and to be honest I, you or we all here did it because we believe in the idea of Bitcoin itself. Transparency of Bitcoin won't attract the eyes of criminals because they need crypto's that are having anonymous transactions like Monero. Criminals don't like to play speculations because all they are doing is to evade law and transact privately for their illegal activities.