I missed to buy bitcoin when it dipped to $9K. Then I missed it again at $10k thinking it might go down to $9k again. And now, I am waiting for $10k but it seems that it will not go below $11k again. I must be the biggest idiot in crypto world 
Just be patient you can catch it anyway. Today another dip had occur as this might be a chance to those willing to add on there investments. If you wait to buy at the lowest price then you had a big chance you will miss that dip. It's difficult to predict the bitcoin market. Buy and sell at your comfort zone.