I think these old threads are quite thought provoking. Each new ATH brings us into uncharted territory.
Back in August $15 was high for NEO. Now six months later it is at $130, and the whole market has risen enormously.

Today is still not too late to buy NEO, or any coin that has good prospects. We have no idea what future crypto cap can be, but year by year the cap moves ever more steeply upwards.