First time I hear of Coincap.
The de facto standard reference for such stats is coinmarketcap.com, which lists a mind-boggling 16,155 cryptos.
There are many, many more than just 10,000. Ethereum as a platform can host cryptocurrencies inside of it, and just that has spawned countless of cryptocurrencies. Many others like Ethereum exists as well, putting the count probably closer to 100,000 than 10,000.
Wait are you serious? 2/3rds of crypto already have a market cap of zero?