The train is still moving up. Don't worry
Trying to jump on the running train is the worst you can do. Usually you become the bag holder and nobody wants to buy it back from you at the price you paid. It is not worth to chase the price, there are many different opportunities around each corner.
Now is this what people said about bitcoin back when it was $5? You just can't predict these things sometimes and it may indeed not be too late to jump on the bandwagon.
My point is that at this stage if you are not on board, the risk/reward ratio may be simply not attractive any more. At least for me.
I may be wrong, but I prefer to miss one opportunity, rather than got burned.
There are plenty opportunities around, thus why not jumping when the time is due.
PS. I agree that volume on ETH is exceptional, bringing back good (and bad) memories from the early days of altcoins.