what you do with the profit or the money after selling depends mainly on your strategy. some people inject a certain amount of money in the market and start trading with it and grow that money. for example you may start with $100 and never get out until you reach $1 million. that means when you make profit you invest it back in. for example when I trade I end up with more bitcoin so basically I invested some fiat but now I am increasing the amount of bitcoin I have by investing back the profit.
but also another strategy is to inject a certain amount of money (lets say $1000) and keep it that way because you are only comfortable with trading that much. so when you make $20 profit you cash that out and keep it at $1000.
but also another strategy is to inject a certain amount of money (lets say $1000) and keep it that way because you are only comfortable with trading that much. so when you make $20 profit you cash that out and keep it at $1000.
This is wonderful, thanks so much.
For example if you sell $10,000 worth of an altcoin at $1 you have the option to buy more of that altcoin at $0.50. Or you can choose to buy the amount you initially had and keep the rest of the profits in BTC or USD. 
Is usually a repetitive incidence happening in the market. 
