now the price of bitcoin is 12,600 $ and will still continue to rise. you should buy now and hold it until at least the end of the year to get a big profit. do not panic if you see the price of bitcoin decreases because usually the price of bitcoin will only experience a slight correction. hold until you get a big profit.
With this quick increase I think it will have a correction for the next following days or before the end of the week. I don't suggest buying now because many people are in fomo again. But who knows, bitcoin is very volatile it could pump even more just like what happen on 2017. It all depends on the op.