Do you agree that more people will choose to invest in bitcoins if there were not so many cryptocurrency choices although not all are good?
Bitcoin is unique.
Those altcoins are 99% crappy, and the 1% that is better is not even similar to bitcoin.
Bitcoin is the only one that is permitionless, borderless and censorship-resistant. And people need it. Not to invest and become rich, but to protect themselves and their property.