The closest thing to a steemit killer (or steem killer) that I can imagine would be a platform that entices Steem users to migrate from Steem to another blockchain, and thereby drives down the price of Steem due to loss of demand. I imagine that eventually, there will be front ends with hooks into multiple blockchains, and they'll automatically make use of the chain that is expected to be the most profitable at the present time.
With Steem's reward mechanism, SP withdrawal windows and head-start on community building, I don't think a competitor will kill it in the foreseeable future, but it might have to share the playing field. That's perfectly fine with me. There's room for several large players in this big world, and competition will make it better.
For a "Steem killer" to be successful they don't only need to entice steemians to use their platform. They also need to make people stop using Steem altogether. I can't understand the competitive mindset people throw around, it's not like we are limited to using one and only one blockchain social media platform.
You just planted 0.10 tree(s)!
Thanks to @fuadsm
We have planted already
8144.55 trees
out of 1,000,000
Let's save and restore Abongphen Highland Forest
in Cameroonian village Kedjom-Keku!
Plant trees with @treeplanter and get paid for it!
My Steem Power = 24445.66
Thanks a lot!
@martin.mikes coordinator of @kedjom-keku