How do Bitcoin traders know when it's the best moment to sell and then buy again?
How to get that moment just before the crash?
How do experienced traders keep holding and predict the best sell time just before the crash?
bitcoin traders are also like many other traders. they don't ever know when to buy and when to sell exactly because nobody owns a time machine or a future telling orb.
anyways it is all speculation. you analyze the market, it can be technical and fundamental analysis and listening to news and checking so many other things to try and make a best guess(an educated guess) and then act on that .