1. do you use it mainly to make money?
Yes.2. how do you make money out of it? mining or buy&sell the coins?
Useing it, Offering Goods and Services, dividend paying shares etc...3. how often are the big jumps in value? like 50$ differences.
Every month now 
4. is there any official value? or do i need to go by what sits like bitstamp says? (131$)
The value is subjective, bitcoin to me looks like a 1000$ item, its head toward that, and eventual were breaking through the wall!5. how much money do you usually make from buying and selling? im planing on starting with a small amount. like 3 bitcoins.
If you're an ok trader with a reasonable strategy, you can make good profits trading. but you really have to be watching and trading the daily action.6. how risky is it? its not like the value drops allot for a long time so there isnt really a risk, especially if im going to mess with 3 coins... (?)
Depends,
you can buy bitcoin then buy bitcoin stocks at havelockinvesment.com, all solid bitcoin businesses are booming right now, these are maybe less risky investments, but the returns are likely to be less then simply holding bitcoin...
but the "risk" associated with holding bitcoin can be gr8ly minimized if you 1) know what you're doing ( encrypted money baby!
) 2) actuly use bitcoin as your "Money" piggy bank wtv you can do to help fulfil the self fulfilling prophecy that is bitcoin