do you really believed back then that a day would come when the coin would get to $100k?
I experienced the era when BTC was below 1000$ (very briefly, also the era below $100). The "problem" is that back then I didn't see it as an investment, but as a tool.
1000$ felt already like a big achievement. My personal guess back then was that it could get five-fold (perhaps $30,000) with a lot of luck, but not much higher. Well, 4 years after (2017) we already got close to that. It wasn't until the 2020-21 bull run that I got convinced that it could come close to 100k.
For Bitcoin to have reached the $100k+ price this year, one someday it will also reach $600k, that is what I believe and I feel convinced because of this season's bull market.
600,000 are possible definitely, but it's not completely safe, because the bull runs are less steep with every iteration (2011-13 we saw almost a 1000x, 2015-17 a 150x, 2018-21 a 20x, measured from the low).
I believe there's a possibility we could see this price either if we see true mass adoption with sidechains, Lightning and stuff, or if Bitcoin can steal some market share from gold in the "store of value" category, but it's already on the upper region of the range I expect.