It wasn't 12k in a decade ago. It was 12 USD. Probably a typo or you read it wrong. But yeah, those you held for a decade (I wonder how many of them are there), invested a good amount is probably leading the life now. But I doubt we will be seeing the price go up the similar way in the next few years or in a decade.
No matter the price of bitcoin, if you have money lying around, you have been given a second chance to invest. Every moment is a second chance!
The difference isn't 7k USD. Look at the picture he posted. Now would be saying the same that gold has been performing better than bitcoin in the long run?