Bitcoin will never end unless we don't have connection anymore.
As of now, i dont think so that bitcoin will end since bitcoin price now is increasing up to 6k. As you can said the only thing that bitcoin will end is if and only if we can lost connection to it. But as long as bitcoin grow the more it can attract people to invest with bitcoin.
It is never too late to invest in bitcoin, because the price is continuouly rising up. And i must say that no one knows when or how will bitcoin end. And if any other coin will replace it. We cannot predict it. Bitcoin can drop if we lose touch of it, i mean if people stops using it, also now that more people are getting used to it, and starting to know and adapt it, we will not lose connection to it.