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...
Every whale has its day. At some point a larger one pops along to gobble them up. This will continue forever alongside ever increasing demand from the little people. There comes a point where a tide can't be resisted and a whale's attempted dump disappears in a feeding frenzy.
Of course, the little people are also only too happy to sell to the whale for less than they paid for it, but each cycle brings in fresher and tougher meat too.
I'd say the clearest demonstration of whale strangulation was when the Chinese zero fee exchanges were in full effect. Anything the West did upwards was shat on by China. Now they're all toast too.