I think it is a good time to invest now some money in bitcoin, i believe that the price will go up again up to 300$
If a friend would ask me, if now is a good time to buy, I would tell him to buy now half of the amount he has in mind. With the other half he should wait a little and see how the price moves.
I think that would be an honest advise, because there is still a possibility of a flash cradh below 200$.
Remember, the crash in the beginning of the year happened with zero news in the background. Just crazy free market rollercoaster.