What can you legally buy with Bitcoin?

I'm quite curious, as a professional practitioner in the field of cryptocurrency and finance, I'd like to know what can I legally buy with Bitcoin? I've heard of people using it to purchase goods and services online, but I'm not entirely sure about the legality and practicality of it. Could you please enlighten me on this matter? Also, are there any restrictions or limitations on using Bitcoin for purchases? Thank you for your time and expertise.