Well, taking you at your word, I'll say this much, before you buy $1m worth of bitcoin with your dad's money (if you end up deciding to actually do this), you better be goddamn sure you know how to secure bitcoins.
Yes to that! You don't know what would happen if you lose those Bitcoins. What would you tell your dad?

Better be cautious... I'd definitely find a secure way of putting them in a very safe place.