Step back for a minute. Is he stupid....of course. But remember, he is not going this alone - his agent is more than likely responsible for this behavior. His agent told him that he was a top 5 pick, but he then slipped. The Raiders took Heyward-Bey, and his agent told him that he was better than Bey, and that he should get Bey money because he was better. That isn't really how it works. Drew Rosenhaus was on local radio this AM talking about this situation, and when asked what he would tell Crabtree, he said that he will tell him to SIGN IMMEDIATELY.
Crabtree is being fed a bunch of malarkey by his agent, and probably his family. Once he realizes that his agent works for him, and not the other way around, he will be better off, because if he doesn't get a deal done soon, he has cost himself a lot of coin over the long haul.