As much as it is great to hear such a young person becoming a millionaire from cryptocurrency, it is clear that he didn't truly believe in or understand the technology. OP states that he decided to compete with his brother with the money he received from his grandmother, depicting a sense of pure luck in this scenario.
"I say if you do not become a millionaire in the next 10 years, then its your own fault."
Seems like a bit of a stupid quote coming from someone who off a stroke of pure luck became a millionaire. He really did no work and in fact, if his brother didn't introduce him into bitcoin he would be like the rest of the nobodies in the world. It is completely different in the real world, people work their asses off and can still barely makes ends meat.