This is the same as when ICO was still trending, early investors will have the opportunity to get big profits when the token is listed on the exchange, but the question is, do all tokens provide profits? The answer is no, first because the price is immediately disappointing at the beginning of the listing, second because as investors, they are often not satisfied with the profits that are already in front of their eyes so they think the price will continue to rise for bigger profits without knowing that there are already those who are ready to throw away a large number of their tokens.
If you are successful with some tokens, it does not mean that the results will always be like that, so be careful because the profits you get can be lost entirely because of one mistake.
If the answer was "most of the tokens make profit" that would still make sense to invest early. But the problem we have at the market today is "majority of the tokens don't make money". It means, one out of every hundred projects could be profitable, rest isn't really that great and we can't grow to get better results from them.
So if you really want to make money, by investing early, you are taking a huge risk and can't grow to be doing any big investment from all of this. I suggested going for long term and investing (accumulating) bitcoin for this main purpose, because it is the least risky thing you can do in the crypto world and you would make some decent profit with it too, and there is no reason not to do it.