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/The news is true. The dominance of BTC has completely changed from criminal activities to trading/speculating . Although the numbers might not be so accurate and might even be wrong but the change of dominance part is true. BTC was being used on the dark web to purchase guns and drugs and other illegal activities on the Silk Road but things have changed now. Also the number of investors in cryptocurrencies have increased a lot now. I can imagine how global crypto is gonna go in the next few years.