Could you elaborate on your concerns regarding the legitimacy of Coincheck? Are you looking for verification of their legal status, reputation within the cryptocurrency community, or assurance of the security measures they have in place to protect user funds? It's important to consider factors such as their regulatory compliance, history of successful transactions, and any security breaches or controversies that may have occurred in the past. Can you provide more context on what specifically you're seeking clarification on when asking if Coincheck is legit?