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.
I don't think we need to tell the young ones to go all in with bitcoin because they have their decisions. They are free to choose whether they are going to prioritize doing bitcoin than other things. They would probably miss a lot of things in their youth if they will go all in bitcoin that's why we should let them choose.