why is there so many different cryptocurrencies

Construction industry (9 days and 8 boards, robot+military industry)Jincai Internet (6 days and 5 boards, financial technology)Huayuan Real Estate (6 days and 5 boards, real estate)

Easyhome (5 days, 4 boards, retail)Jincai Internet (6 days and 5 boards, financial technology)Xingguang shares (4, lithium battery+household appliances+quantum technology)

Jincai Internet (6 days and 5 boards, financial technology)Huayuan Real Estate (6 days and 5 boards, real estate)