Depends on whether you mean the actual negative power carrying wire or a green wire/AC voltage 'ground':
And if its marine, but I assume its not.
If its the black "negative" DC power wire:
You should run it to the bus bar period. If possible do this for everything.
You CAN go to the chassis, but you WILL cause minor issues that will get worse over time and MIGHT have major issues up front.
Strongly suggested to not do this. You might also experience nasty ground loop interference with your radio.
You will likely also create a galvanic charge differential causing increased corrosion of the chassis but its less of an issue for non-marine stuff.
If you are referring to the green/ground wire for the AC voltage system:
Depends if you are in the US or certain areas of the world with actual regulations on where that can be hooked up.
US:
Send it however you want but the above suggestions apply to this ground wire as well.
UK:
I believe its code to tie the chassis grounds to a dedicated AC ground point separate from the DC stuff with a clear label.
(And I believe this is dumb per above reasons but the code is aimed at the lowest common denominator)
I had this conversation with a few UK folks on facebook more than once.
If its marine, the whole thing is another topic and we should involve an expert on this for many safety and galvanic reasons.