actually l did once when l lost 3500 usd in a single day.l was very depressed.l have lost it cause of greed.then l erased all of the e-mails from my brokers and l uninstalled all the platforms from my pc.but when l was thinking later on it was not the fault of forex or my broker but it was my own fault.so l have decided to trade again but not to make the same mistakes.now l m still here :)