I don't know if it's your luck to be at the right market moment or it's your knowledge. but from your story, I think you are just getting to know Bitcoin. Honestly, it's very risky, and don't try it again. now the price may not be as you expected in a short time.
Your luck is to buy at the right time and you get a good moment to sell. I can't imagine if the ending isn't what you expected. I mean you can't know the market, if the moment you need the money and you have to sell the Bitcoin you have but the price decreases, it will only make your father's head explode.
How do you convince your father with the remaining money you managed to invest?