how do i get into cryptocurrency, Knowledge

When it rose from three dollars to six dollars,This is called the cost of silence,Will it come out or not?

When many retail investors buy stocks, if they rise by a few points,Buy stocks, buy uptrend, not downtrend,Are the three situations mentioned above true?

Third, what is disposition effect?So many times, I will make very little money and run away.When you open a warehouse, you find that it is halfway up the mountain.