I just bought 6.7 BTC @ $144.49 so of course the price will now plummet but I'm ready, I've got another $4,000 ready to go in. Then again having revealed my plans it will rise until I've got my whole $5,000 in and then it will plummet. All the smart money will be selling, even selling short, given my move into Bitcoin.
Nobody can predict a market such as BTC (at least not a common person), and all of us want to buy cheap. The only way I feel good about buying is when I spread my purchases in 3-4 lumps over a few days apart. If prices go down, you double down. If price goes up you wait for a pull back. BUT never chase on the rise and never panic sell.