It's not only 2000 it's more than that since the introduction of the first Cryptocurrency Bitcoin because it's open-source people can easily create their own coin, and when Ethereum came along with it's token creation platform, everything becomes so easy to create a toke, and with this many companies, individuals and groups are creating their own token for their concept or product, it has something to do with greed because with their token they can launch ceowdfunding.
That's right, open sources and crowdfunding methods that require a project to have tokens are the 2 most important factors in the creation of a coin and the reason for the large number of cryptos. besides that, crypto is a business, and a business must have an ecosystem to be able to continue and work