Blue or red door?

True, true. One of the mistakes however is not buying tech stocks in their infancy, so you'd wind up with way more than 10m.

The blue door implies that your current existence is the one changing your past, i.e. you retain the knowledge of your current existence. The 'you' that made those mistakes therefore still exists, as you would remember the mistakes you've made in order to correct them. The mistakes still happened, your timeline still exists/existed, you're just now in an alternate timeline where your brain was surgically implanted into your younger self.

Because you have a different view of time and space. You could go back in time and stay the same,it's just a different timeline, where you see a younger version of yourself. But changing anything in his life don't affect yours, only his. There can't be paradox in this model.

Exactly! I can’t count how many times I’ve messed up, but without them I wouldn’t be who I am today. Hence why I pick the red door, not for the money, but so that the experiences that shaped me still mean something.

Bingo. We are the sum of our experiences mistakes and all. I have an ex i I still long to be together with to the point of a physical ache. But I still wouldn't take the blue door.