If you think borrowing money at an absurdly high interest rate in a way that makes you look like a scammer is a sensible way to start a business, you are a very poor businessman.
Don't you have any friends or family -- or anyone with a reason to trust you for that matter -- that would be interested in such an amazing deal?
Yeah the rate is high because I'm a new member and an exchange thing is risky, and I really want this project.
If this crowdfunding will be unsuccessful I try btcjam or finally a bank loan.
My family is poor, in Hungary 99% of all people is poor

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If you would even think of asking for a loan at such an absurdly high interest rate when there's even the slightest chance that you might be able to get a bank loan, you're either a fool or a scammer. Either way, loaning you money doesn't sound wise. Honestly, do you have any rational understanding of how absurdly high the interest rate you are offering is? Such rates are almost always offered by scammers or fools, if for no other reason than that offering such a rate makes everyone think you're a scammer.