Do you HAVE to prestige?
Solution 1:
You don't have too, but there's a few minor advantages to prestiging: You get access to additional player card backdrops, more custom class slots, a prestige only leader board and prestige specific playlists.
The main downside is you have to earn all of your unlocks over again. The only thing you get to keep is your player card. Not even your CoD bucks carry over.
My advice? If you got to level 50 in less than a month, and intend to play the game for a few more months, prestige only once. There's plenty to do after you hit 50. I still have a bunch of challenges left to complete (although I did prestige once already and I'm at 50 again now).
I don't know this for sure, but if the matchmaking algorithm considers the prestige count and you're a mediocre player that got his level through playing a lot, rather than skill, you may actually end up playing with people who are significantly better than you when you do prestige, if the assumption is true that hardcore players who genuinely are better than you are more likely to prestige. Yeah, there's a few assumptions here.
Solution 2:
I believe you don't have to prestige, but level 50 is the maximum in Black Ops.
Solution 3:
You don't have to, but you get a nifty icon, more custom class slots and access to a few more player cards. At later prestige levels you get alternate face paints and even golden gun camo at Prestige 15.
IMPORTANT TO KNOW: The ONLY things you get to carry over to the next prestige level are the modifications to your player card. If you're going to Prestige I highly recommend spending every bit of your COD bucks on player card alterations, because you lose all of your COD bucks when you Prestige.
Solution 4:
It's your choice. When you get prestige, you can access many things like the golden fun (at 14 prestige), new custom items and also a player card. Don't worry about your level because at your prestige they should see your emblem not don't care about the noobs.
The level doesn't count because even though you are at level 1 or more, and you are versing a level 50 opponent and using a weapon like an mp5k, you could still win. So don't worry!
For me, I think is better to get prestige because you are stronger when you face with people of your level and you could win 1 rank. Then you will gain more respect from them!