Crowdfunding with Bitcoins is hard. Seems like it never got so successful and popular like crowdfunding in fiat. Maybe also because of Bitcoin volatility. There are only few web pages that are offering this service but it takes long to get funds and it's not very certain that you will achieve the goal. Try with collateral loan.
Well, it is because once you give bitcoin to someone you will never get it back.
And with FIAT crowdfunding services have this nice feature when minimum goal is not reached every contributor will receive his money back.
Plus, our community already seen so many scams that any project not backed by known, reputable and serious individuals is branded as potential scam right away.