I'm more surprised it still have high price, compared with other Bitcoin forked coin (such as BTG).
It is not
totally without technical merit. It managed to attract some smart developers who were also either fooled or were hoping the con would still be profitable for them. They have now all moved on to other projects. BSV was also an experiment about the bounds of block size, and the consequences of centralization. It sports an unwieldy blockchain - now over 11 TB in size. The full archival nodes of Ethereum and Solana are much larger than that but Bitcoin needs the complete transaction history for it to work and those coins don't.