Is Uphold legal in the US?

Could you please elaborate on the legality of Uphold in the United States? I've been hearing about this cryptocurrency platform and its services, but I'm not entirely sure if it's compliant with all the necessary regulations in the US. As a cryptocurrency enthusiast, I'm always cautious about using platforms that may not be fully legal or might face regulatory issues in the future. Could you clarify whether Uphold is operating legally in the US and if there are any specific licenses or permissions it has obtained to do so? Your insight would be greatly appreciated.