There's always a reason why someone procrastinates when in accumulation. Some unexpected life events might have occurred and that's delaying the purpose of their money for buying Bitcoin.
What if bitcoin corrects 20% this time, you sell everything on the way to the top, won't buy back on the way down and the run up resumes, leaving you behind? You'll milk yourself, or other bulls milk you and leave you behind.
This is what pretty much happening nowadays. When someone buys at the top and then the market corrects and then there's nothing left anymore. It's best to DCA and just plan your stay for a longer time before you sell.