No, its not the best time. Because the price of bitcoin right now is going dump. Wait for the right time to rise up again. Patience is the best right now.
I think if you are really worried about the short time gain then buying out at a certain point it would be very important that it is advisable to buy when there is a setback going on the price.
If we relate or go for long term then I would say anytime would be the best time to buy bitcoin and if op can buy at the time he post this thread then surely hes on the advantage of seeing bitcoin prices not rising eventually into new good heights for traders short and long term