There us no right team because you never know when it is going to rise again and when it is going to drop again that is why i would say just buy it and hope for the best because it will rise even if it goes down after the moment you buy.
I think you are right because there is no way you can now when the value will go down or go up but sometimes you can like see it drop and maybe then is the right time to put some time to see if it really goes down or will go up again.