Yes thats good quote, im totally agree with it.
My biggest mistake is a feeling of greedy.
on December last I made a big profit with the price increase in cryptocurrency, but I did not immediately withdraw and i continued my trading.
But suddenly the price falling down, but i keep hold it because i believe the price will bounce back, indeed the price is bounce back, but then the price was going down lower and lower again. Until now, i lost almost 90% of my capital because of that.
So i regret of my greedy and did not immediately withdraw it.