If you are still a child and thinking about investing in Bitcoin, I would like to congratulate you as you are on the right path. Bitcoin's price has risen a lot since its inception, but that doesn't deny that it will rise more in the future, and that's due to many facts, one of which, Bitcoin is still unknown for a large portion of the world's popularity. The second fact is that companies have just started buying it after it proved to be a survival boat. In addition, the market cap is very low compared with other investment assets, so the potential to grow is high.
Regarding the amount of Bitcoin needed to achieve financial freedom, I think 1 Bitcoin is a very reasonable amount, even at these prices, because $30k isn't an affordable amount of money for everyone and it's a lot of money for most of the world's population. Therefore, if you managed to collect 1 Bitcoin, I believe you would be rich. Maybe not this year as the bear market is still in play and the world is experiencing a financial crisis, but for the next 2 years, Bitcoin is one of the best things to invest in.