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...
Do you really think that the whales are going to bother to earn 5% to 10%? They are whales they are only going to move unless there is a huge profit to be had, they are some of the strongest holders and they only move when they see a huge opportunity to manipulate the price to go up or down, so the reason you are giving for why the price is never going to reach 20000 again is very weak.