when you want to be an engineer, doctor, lawyer or any high pay jobs you need to spend at least 5 year to gain knowledge about that profession, Cryptocurrency and trading is not different from other profession. you need time to learn and gain knowledge about it. 
not sure if this is a fair comparison, but we can say it like, as long as you learn, as much as you make fewer mistakes, that is why doctors take much longer learning, because it is one of the most jobs that we will never want to have mistakes, and rocket science (you know why
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