I told I will give him $200 to start trading bitcoin
I understand your intensions were good but giving someone money so he can start trading online I'm not sure it's actually something good, it's like giving money to someone so he can bet, pretty much it's the same thing. Does this person know anything about trading? And what about crypto? How do you know this is not going to turn into something more addicting? I think you should be extremely careful now and keep an eye on him.
Since he has changed his life for the better and has made a profit with the money he gave him, it is not a bad thing if he becomes more addicted to cryptocurrency because he already knows about bitcoin and understands trading. If not for that, if he stops trading, how do you think he will make it through school when his parents stop sending him money, so it is better if he should continue investing.