for example i trade with 500$ after some days that particular coin raise up my 500$ turn to 600$ i can use 400$ to invest and use the other for home purposes but i think it can work if only the coin have a good value but when the coin worth nothing your 500$ might come down to 200$ that's the risk in trading sso please is this decision of mine good or bad?
Trading is like a chess game. You cannot predict one hundred percent accurately what steps your opponent will take. Likewise with trading. You will not be able to know exactly where the price will move even in the next hour. One of the causes of failure of novice traders is ignorance of the basis of good risk management.