trước cũng định bỏ nhưng mà nếu chơi lãi ít và ổn định thì vẫn ok

I advise you to leave this cryptocurrency market. The prices are unstable, going up and then down, and when they drop by half or a third, why participate anymore? Ideally, it should be stable and progress steadily if it is a currency of the future. This is like a gamble now.