Can US citizens use Bitbuy?

I'm curious, could you please clarify for me whether US citizens are permitted to utilize the services of Bitbuy? I've been hearing a lot about this platform recently and I'm quite interested in exploring its offerings. However, given the complexities surrounding cryptocurrency regulations in the United States, I'm a bit hesitant to proceed without a clear understanding of the legalities involved. Could you please provide some insight into this matter? It would be greatly appreciated if you could shed some light on this for me.