Could you please explain the reason behind Coinbase's decision to shut down? I'm quite puzzled as to why a leading cryptocurrency exchange would take such a step. Is it due to regulatory issues, security concerns, or perhaps financial difficulties? I'm curious to understand the specifics of this decision and its potential impact on the cryptocurrency community. Could you shed some light on this matter? I would appreciate a detailed response that helps me gain a clearer understanding of the situation. Thank you in advance for your assistance.