I think that this is not the lowest price for Ethereum. According to forecasts, it should drop to 300, then you can really invest to the maximum, knowing that the bull market will reimburse everything that is lost this year.
I am in a favor of this thing that you should go for investing of your money whenever you get a chance of doing so. It is because you never know the market situation in the coming days. So, it is not a good idea to wait for little longer hoping that the market value will go down as things can go other way round as well and that you need to take that opportunity in the best possible way.