Are proxies legal?

Good day, I'm curious about the legality of proxies in the context of cryptocurrency and finance. As an investor, I often encounter various tools and services that offer proxy solutions for anonymity and security. However, I'm not entirely sure if these practices are compliant with the law. Could you please clarify if proxies are legal, and if so, under what circumstances their use might be considered legitimate or even necessary in the cryptocurrency and finance world? I'm eager to ensure that my investments and transactions remain within the bounds of the law. Thank you for your insight.