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...
I'm more confident the bitcoin will increase by 20k. Currently the market is in chaos and bitcoin is difficult to increase the price, but I guess it's not over and bitcoin will go up high and reach 20k, and it's just a matter of time.