You don't need a weed forum to answer that for you. What bests suits you? What are you saving for? If you need a new kidny in a week obviously you should save the $. Depends on your situation.
id say put it in the bank and let it build up with the interest and shit they give you, so then you can jus save up and keep getting more, and maybe takin lil bits out at a time for a sack here and there...........thats what i do =)
i would put it in the bank, i always come up with a little cash for weed, but who knows what stacking sums of money like that could eventually amount to.
I say get a bottle of liquor and a prostitute that allready has a sack J/K NO but you really dont need to get the best weed out there. Settle for a sack of regulars that way you have money for yourself and still have herbs. Go watch a movie or take someone you care about out to eat.
I think it depends on how you got it, if it was like a scratch ticket or somethin then its free money smoke that hsit down, but if its a pay check then i would save it. remember its not what you make, its what you save that counts.