Forget about everything else and just put everything on bitcoin. You are living with your parents, they pay everything for you, you got nothing to lose. If I was living with my parents, I would save everything and buy bitcoin monthly. If BTC doesn't keep rising you can still reach the 21 BTC holder group, then save this and retire in 10 years when the price makes you a millionaire.
Go all in on regret later. You are on a privileged position to profit from high risk high reward moves. No risk no win, and BTC is the best long term high risk bet.
The problem is you are putting all your eggs in one basket and while it could turn out to be great at the end there is a reasonable chance you will end up broke that is why it is never a good idea to go all in especially in something as changeable as bitcoin.
Good metaphor. Just like building a high tower and in the end you may end up broken due to the fact that your foundation is not that strong enough. You may say that it may give you good outcome but still the risk is high if ever you will not become who you want to be. You should focus more on the things that can make your foundations firm and strong. You can set bitcoin as a side job only and time will come you will get to say that your decision was right on not going all in with bitcoin.