Let's have 10k+ coins, lets have a million coins, as long as people show interest to some of them, it is fine with me. Obviously not all of them gets attention but time to time some of them actually gets so much attention that it directly breaks into the top 10 as well, which is what I love about new crypto, 999 of them becomes bull shit but 1 of them becomes super awesome.
That's certainly true, mate. No matter how many coins there are on the market, only those that are able to provide real use cases for the mainstream world will succeed in the long run. Most of them will die simply because of decaying interest from developers and everyday people alike. I think that the more coins on the market, the better the competition will be in the crypto/Blockchain industry. Developers from various projects could merge their ideas in order to make crypto land a better place. No matter which coin it is, new features that are tested by various developers are sometimes adopted by major cryptocurrencies like Bitcoin and Ethereum. Eventually, people will decide which coin remains actively traded on the market and which does not.
Nonetheless, a large number of coins could prove to be useful for traders on the market. For the average investor, prominent cryptocurrencies like Bitcoin and Ethereum may be all they need for their capital to last a lifetime. I wouldn't be surprised to see many more coins in the future, leading towards the prosperous growth of crypto/Blockchain tech in general. Just my opinion