Are my bitcoins save at kraken an exchange site?
NO!Your keys, your money.
Not your keys,
not your money!
Realy ?
What can i do now as Fast as possible ?
Making over to an hardware wallet?
The easiest thing you can do is install a good wallet app on your smartphone and move your coins there. A good choice is Mycelium Wallet (available on both iOS and Android). When you install it, make absolutely sure to write down and safely keep the Recovery Seed (12 or 24 words given in a specific order). Those words are your private keys (they are the map to get to them).
Another option is to use a paper waller generator to generate a paper wallet and move your coins there. A good choice is
https://bitcoinpaperwallet.com. Make sure you follow the security guidelines towards the bottom of the page. Ideally you should run the paper wallet generator code on a "live DVD" or virtual machine that is not connected to the internet, print the wallet, and then reboot your PC (or wipe out the virtual machine session).
The best choice is to use a hardware wallet such as TREZOR, but I don't think you have enough time to purchase one and have it by 1 August...
Using any of the above methods, you control your private keys and, therefore, you own your coins.