Bitcoin is lovely, but the fact is that Steem is earned not by running a mining factory but by producing work that other people like to read or watch. Since the web is essentially entirely things people like to read or watch, it strikes me that as soon as people catch on to the idea that there's a place where their brilliant dissective essay on ACHA can actually pay them money, they're going to come here in droves. I can't see any reason why they wouldn't. What does Bitcoin have to offer over that?