I can answer that for you. It is relatively simple actually. Dan Larimer was never intending on bitshares being his only project. Instead it was the intent to make many "Decentralized Autonomous Corporations" (DACs) that would offer various services which could then trade on the flagship DAC --the BitShares Defentralized Exchange (DEX).

Now bitshares has a very strong and capable community that is in many ways led by kencode and chris hering, and steem (and sbd) both trade on the DEX.

So if i were you (in fact if i were me...which luckily i am...) id be more interested in figuring out what his next DAC will be...cause it will trade on bitshares too ;)