Yep, mate that's the truth!
Sometimes, facing a risk can lead to a life-changing opportunity. And this is the same opportunity you missed, but Bitcoin follows such a pattern that it definitely provides opportunities to opportunity grabbers. So now it's okay that your brother didn't believe you, but the first mistake you made was that you recommended a volatile investment like Bitcoin. You had played the role of a financial abuser, but it is good that your brother did not invest in your request because if he had lost, he would have blamed you. 
 
But anyway, OP, now that you don't get any benefit from sitting and regrating, you still have an opportunity to invest because a few moments before halving have just happened, and maybe Bitcoin can hit 180k to 200k in the near future. So you can get a good profit, but I am not giving this financial advice but for an educational purpose.

DYOR!