Plus bitshares is hard to sell due to being ...complex crypto. Bitcoin is already "complex" for most people, imagine things like bitshares, ethereum, etc.

https://bitcointalk.org/index.php?topic=637645.msg7114149#msg7114149

https://bitcointalk.org/index.php?topic=637645.msg7116563#msg7116563

I believe ETH is the only exception so far, and that's not because it captures exo-crypto demographics or was "easy to grasp", but rather due to huge investments in the hundreds of millions by corporate money. So the money made it rise and then people were kind of forced to look at it.