Hello.
im starting out in the bitcoin world and i want to ask you somethings:

1. do you use it mainly to make money?
2. how do you make money out of it? mining or buy&sell the coins?
3. how often are the big jumps in value? like 50$ differences.
4. is there any official value? or do i need to go by what sits like bitstamp says? (131$)
5. how much money do you usually make from buying and selling? im planing on starting with a small amount. like 3 bitcoins.
5. 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... (?)

thanks.