I understand. Its like trying to fill the universe with sand - There simply is not enough sand.
Thank you all for the responses!

_{If u would have too much bitcoins, you can always give this noob some money: 1B7Q9rHGSXJpbwugLdE3o8eNAZVkCL7hpr}
BTC Thanks again!

So, I have a question.
I got a paper bitcoin wallet. On the frond side there is my public bitcoin address. On the back of the paper there is a private key.
On my smartphone i have a bitcoin app, which allows me to scan a private key and import bitcoins from the scanned address. Now, I would like to know if it is possible to brute force this private key if you know the Public key? I mean, It's pretty long, but I could imagine that if someone has some damn good CPU/GPU/RAM and a lot of time (6 months - 24 months), he would spend his time cracking Private keys off full wallets. Is it possible to crack a bitcoin address this way? How long would it take? Or am i completly wrong here? I am just thinking about this, because a friend of me has 4 BTC in a wallet, and i just think it is not safe to keep such a budget in an wallet covered by a basic charset key. (a-z;A-Z;0-9).
I just want to know.
Thx in advance,
xbmbmx.