I doubt that top 500 will be available that is a good amount these days, it is really not that easy to be listed there.
However one thing is for sure, they have a power of passive income with them and even though some people may end up selling and getting out at first, there will be a good amount of people who buy to have a passive income. What is required is two things ; A) Find a way to get much more people gambling here because that is how you increase dividends, B) Give people a reason to lock their tokens so they can't sell.
Top 500 is not that hard as long as you can go up a bit and then get heard, because nowadays the top 500 and top 1000 for example are not that different, I have seen a coin go from 417th place to 4506th place in the past 4 months, in the early march days it was 417th at its peak (don't know maybe it went even higher?) and today I checked it is 4506th, think of how much one thing can change so quickly it was just a few months ago. Same could happen on the other side as well, something that is at 4506ht could become 417th as well.
This is why I believe top 500 is possible, definitely not easy I can give you that but it is "possible" and that is the key. All there needs to be done is to show how much the dividends can make you, how valuable it is to own and keep this token and how much you can earn just by holding it, when you can do marketing of it and get everyone to check it out, you can be even in top 100 for sure.