So is this a good time to buy some bitcoins?
Prices for all the main crypto currencies are going down after a December peak. I would say give it another month (or two) and see if they are still going down. That is my plan. Another couple of months falling and they will probably be back where they started.
It is the poor saps who brought at $1000 I feel sorry for.
a good time to buy bitcoins is when you need to use them to buy something!