Where can you purchase XDC?

Could you elaborate on the various avenues available to purchase XDC cryptocurrency? Are there specific exchanges or platforms that offer XDC trading? What are the steps involved in setting up an account and making a purchase? Are there any regulatory considerations or geographic restrictions that potential investors should be aware of? Additionally, what are the transaction fees and turnaround times typically associated with purchasing XDC? Furthermore, is there a minimum investment requirement, and what payment methods are accepted for the purchase of XDC? I'm particularly interested in understanding the most efficient and secure means of acquiring this cryptocurrency.