Before you seek lending or apply for a Bitcoin loan you want to make sure that a loan is really what you need. Many lenders will not give out loans to borrowers without assets or collateral. The ideal circumstances for investors are existing businesses with revenue who need capital for expansion. If you are looking to get a business loan for a startup "idea" with no infastructure, then kickstarter may be a better alternative.
However, you can start small with micro loans while you build your trust and move onto bigger loans for riskier business ventures.