Trying to time things is mostly a sucker's game. It can be done, but you have to have your emotions in check.
As with any asset, it either belongs in your portfolio due to its asset characteristics, or it doesn't. Buy it based on that.
But to your question, yes, many will. They will say "oh, I missed it" and watch it go to $3,000. At which point they will buy because they don't want to miss any more and it will universally be forecast to run forever. That, of course will be the top and when it gets down to $2,000 again they will sell, unable to bear anymore pain. Which will be the bottom...