How safe is dYdX?

Could you please elaborate on the safety aspects of dYdX? I'm curious to know about its security measures and whether it's a reliable platform for cryptocurrency trading. Additionally, I'd like to understand how it compares to other exchanges in terms of safety and security. Could you provide any insights or testimonials from users who have traded on dYdX? I'm also interested in knowing about any potential vulnerabilities or security breaches that have occurred on the platform in the past. Thank you for your assistance.