Of course Bitshares has way more potential than these, I would never disagree with that.
But its worth throwing a small amount of funds at them because their market caps are very low.
Burst is worth less than 100k in total even after having gone up some the past several days. For what could be the first coin to ever do an ACCT with Bitcoin, thats cheap. Even if ACCTs dont end up being more than a curiosity, the publicity is generates from doing that would probably bring the price up a lot.
Just put in .1 btc or something thats basically no risk and see what happens. The market cap is so low that you can actually get a decent amount for that.