share experiences, Buying and Selling Bitcoin when prices are high is risky. surely a bitcoin trader has experienced the name of loss on bitcoin so how big is your nominal loss in bitcoin trading in your life? and is there any suggestion to reduce or avoid loss on bitcoin 
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Yes of course, there is a thing called risk management and you should try that. I cant tell you how to do that but its there on youtube and google.?Dont overtrade, dont follow your emotion, find the pattern that mostly works and dont trade when you dont see that pattern.