Ulsan District Court in South Korea recently sentenced a major drug smuggling case. The main culprit of the drug gang was sentenced to 20 years in prison for smuggling drugs through international express delivery, along with a fine of approximately $4.2 million. Prosecutors accused the criminal of conducting transactions and settlements using cryptocurrencies such as Bitcoin on Telegram, which were then used for money laundering. This case highlights how criminals exploit the anonymity and convenience of cryptocurrencies to carry out illegal activities. The three accomplices involved in the same case were also sentenced to prison terms ranging from 30 months to 3 years. This case serves as a reminder to market participants that while cryptocurrencies have technological innovation value, their characteristics also make them tools for criminals.