Anyone noticing new projects still raising millions of dollars? Mohash and Dynamic for example, I think new projects will replace lots of top altcoins in coming years and my advice to young investors is to find new projects to mix with their portfolio, remember that Matic, Polkadot, Avalnache are once all new projects in 2018/2019..
With all these new projects comes a flood of altcoins designed to be used as utility tokens to provide access to their platform. As of now, I can't say how many will succeed and how many will fail beyond a good whitepaper. maybe wait a few more months to see if your coin is listed or not. I don't think launching a new exchange will make any significant changes in the market.