Probably buy more
That is going to be a good opportunity if you are going to buy more a lot of bitcoins with that price only if you are really going to take the risk. It is going to be a risky thing if that is going to at that rate and you are going to buy a lot more. And you don't know what is going to happen if you are going to buy with that price.
That is why we need to buy only how much we can afford to lose because what ever happen we will never depress on our investments because the risk we have in online investment is too high we only lessen the risk if we invest small amount of our money but the return of it is also small.