But wouldn't that just confused other users if there are way too many cryptocurrencies that exist?
If those other users are well informed about cryptocurrencies they shouldn't be confused which one is which unless someone tries to deceive you like what roger ver's site does.
Not the scam ones, but the legit projects that created their own coins to crowdfund their projects, does it really work, and what if they have reached the target amount? What's next? What happens once the project is successful? It's just that with all the scammers around, it's sometimes hard to believe the reliability of new coins.
After that they have to do what is mentioned on their roadmap. One of the many problems that you'll notice is most coins tend to lose value because of Bitcoin price movement which stops others from supporting a certain coin even if it's legit.