What is a Bitcoin mixer / bitcoin tumbler?
Could you please explain what a Bitcoin mixer, also known as a Bitcoin tumbler, is in simple terms? I've heard the term before but am not entirely clear on its function and purpose within the cryptocurrency ecosystem. Are these services legal to use in all jurisdictions? What are some of the potential risks associated with utilizing a Bitcoin mixer? Additionally, how does the process of mixing or tumbling Bitcoins work, and why might someone choose to use this service?