I believe someone is already GPU mining it and planning to dump thousands of coins.
And your evidence for this is what?
People kept believing that Primecoin was being GPU mined, without any evidence. And still no-one has admitted to being able to mine it on GPUs, the two well publicised efforts both ending in failure.
Primecoin wasn't made by a corporate entity with funding. I'm not saying Bitshares is a bad idea, I like the idea. I'm saying this new algorithm seemed to be untested and their parameters I immediately knew were right.
But hey, if you manage to get some coins thats fantastic. I just don't see those coins going for a lot right now. I think the smart person will be the one who mines now and holds onto them until they convert them to Bitshares.
Do not sell a single coin. Each coin may be worth something decent but not for the next 6 months. Bitshares needs time to develop the decentralized exchange which will be powered by this coin.