So you are assuming he has more capital than he is putting in the trading account? He/She never mentioned that in the OP. It's all speculation at this point. All I am saying is if 50k is all the money the OP has it will be tough to live on nothing for a year.
So do you think he has the chicken or the golden egg? I do not think he says that he wants to live on his $50,000 from day one.
No need for that. OP just asked a general question. He is asking if he can start with $50,000 and make a career of full time trader from there. Yes he can. But he will have to have an excellent start and live with a minimalist style.
OP is based out of Egypt according to his profile. Maybe he can live on $15k per year. I have no clue what his expenses are so hard to say.
He wants no leverage. Why is everyone not able to read his parameters? A no-leverage way to make it. Since he speaks about no leverage, he can trade stocks, bonds and cryptos. Can he make it with no leverage.