You don't really have to track it. Just set a google calendar event for 10 years from now, and look back at the stock history then.
If somehow google services go away and you don't get that event reminder, the question may be moot by then... not really, but an interesting thought anyways.
I think the moment you're thinking of is when the son is playing video games, and mentions his high score. The score was some absurdly high number like 12 million, one of the other family members hears this and repeats it aloud (I believe this family member was previously controlling the microwave); the microwave hears this number and replies "heating to 12 million degrees", burning their Christmas turkey (just like they did every iteration in the ride, even as the technology progresses). I'm not sure why I bothered typing all of that, I haven't been to that ride since I was ~ 12.