A couple of thoughts:
#1: is there anything wrong with your present car? If there are no issues, then why do you want to change?
#2: never trade your car in, always sell it private party. When you trade it in, you are leaving thousands of dollars on the table. So what if it takes a month to sell? If someone said to you: hey, if you simply have the patience, I'll give you $3000. Who in their right mind wouldn't do that?
#3: you're paying cash for the new car, right? If not, DO NOT do the deal. Millionaires don't finance things that are guaranteed to lose value. You want to be a millionaire someday, right? Then you have to start acting like one today. Because lets face it: a million dollars truly isn't that much money in 2020. Sure, you can retire on it, but you won't be rolling in cash by any means, especially when a house can easily cost $250k or more. Depending on where you live, WAY more.