Bonino will 100% be resigned. Speculation of trading him is pointless, but I guess it's all in good fun.
I don't know if I agree to this or not. Bonino WILL command a high price because he IS A very GOOD player. I'm sure there are teams that think he will be a very good 2C, or maybe a 1C with great talent on his wings for them (just like he was in PIT). What is he going to be on the Pens? Always a 3C, behind Malkin & Crosby. Someone will offer him around 6mil/year and a better role if Lucic/Ladd got that kind of money.
Don't forget that he scored just 1 less point than the Con Smithe winner AND also had a much better +- than Crosby too....while also playing 3 less minutes per game. Bonino had a better playoffs than both Crosby and Malkin by just about all analytical accounts (pts/60min, GF%, etc).
That will not go unnoticed around the league. Don't act like Bonino just rode the coat tails of Hagelin and Kessel the entire time either. He was just as good as his talented wings and didn't look out of place against ANY of the top line Cs he faced off against. There will be teams that think they can reproduce that production from him. It doesn't matter if they are right or wrong about that thought (No one knows now), they will set his value high.
That kind of player is not going to be 100% easy to sign without a lot of cap room IMO. Bonino has a LOT of leverage in any negotiation. He only makes about 2mil/year now. He will certainly want much more after seeing his comparables salaries.