How to buy Nexo in USA?

Inquiring minds want to know: How does one acquire Nexo tokens in the United States? Could you provide a step-by-step guide for the novice investor, outlining the necessary platforms or exchanges, the verification processes, and any potential challenges or regulatory considerations that might arise? It would be greatly appreciated if you could also discuss any security measures that should be taken to ensure a safe and secure transaction. Furthermore, could you elaborate on the potential benefits of owning Nexo tokens, and how they might fit into a diversified cryptocurrency portfolio?