Simply because the WHALES take the profits whenever there's a 5 to 10 percent growth. The bottom line is Swing trading and Day trading is real and the HODL method is just what it is...
When you came into crypto currency world? the prices of bitcoin keeps increasing each and every year so $20000 is not maximum value and bitcoin will surpass that value sooner or later but it will happen.Already the prices are recovering so it looks like another crazy run will happen like happened in 2017.