There will always be enough room for all the cryptocurrencies and also for the newcomers. Because not all the old coins will remain or be what is it now. The truth is, there will always room for the new ones because the old ones will fail or will decide not to continue their operations due to various reasons.
The Crypto is about the competition, who can try to create the product and it will be trusted by the community, so many projects don't have competence to create such a new platform. and that's why a lot of investors are loosing their faith to that. remember the only those coins are not trusted will not be trusted by the investors. So many copycats platform and that makes so many coins died.