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 
well the price is hanging around $10k and $11k for a while now. that's a fantastic low price to get in. So just buy whenever you want. Looks like it might take a bit for it to head back up near the ATH.