Can you legally resell?

Excuse me, I'm curious about the legality of reselling certain assets in the cryptocurrency and finance world. Is it permissible to resell digital currencies, tokens, or other financial instruments that I've acquired? Are there any regulations or restrictions I should be aware of before engaging in such transactions? Additionally, how does the process of reselling these assets typically work, and what precautions should I take to ensure that I'm complying with all relevant laws and regulations?