22000 cryptos, How many do we actually need ?

I've recently had my eye on the ticker at the top left side of CoinMarketCap showing the ever growing number of cryptos and exchanges. It just hit a nice round number of 22000 cryptos and 530 exchanges listed on CMC

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22K cryptos and 530 exchanges on CMC

I do see the point of having more than one crypto project to address the different functionality needs of the community, and I also understand how we can't just wish to have BTC or even ETH by themselves for all use cases.

There have been a handful of projects that i've kept my eye on, but seeing how this number only keeps on growing frustrates me that the average enthusiast (or even the veteran at this point) can't possibly do their own research on most coins. If you pick 22 projects (as a realistic number given the effort ) to dive into and understand the fundamentals/mission/milestones you'd still be only covering 0.1% of what is out there.

How on earth would you gauge the projects without leaving it to advertisements and campaigns that try to increase exposure/visibility of a crypto ?

In an ideal world, or say after a massive cleansing season, how many cryptos would you like to see survive to legitimately leave a mark on the world ?

Finally for the exchanges, do you think we really need so many exchanges ? I'm also hesitant to let a few big fish dominate that niche, but isn't having a few well regulated and fully backed exchanges better than this farmer's market ?