The biggest con of OTC is its lack of regulation. Without regulatory oversight, there is no guarantee that OTC complies with industry standards or provides adequate protections for its clients. This lack of regulation increases the risks for anyone using the OTC trading platform or opening an OTC account. Additionally, the company only offers a mobile app for trading, which may not be suitable for all traders, especially those who prefer desktop platforms. This mobile-only option can be limiting for some users.