Could you please elaborate on the steps required to purchase Core DAO coin? As a cryptocurrency investor, I'm interested in understanding the process from start to finish. Firstly, where should I look for an exchange that offers Core DAO? Are there any specific requirements I need to meet in order to trade this particular coin? Once I've found a suitable exchange, what are the steps I need to take to buy Core DAO? Is it a straightforward process, or are there any complexities I should be aware of? Additionally, is there any advice you can provide to ensure a smooth and secure transaction? I appreciate your guidance in this matter.