Bitcoin loans or simply called bitcoin lending are now become popular simply because of many people who want to have that. In this forum you can see a lending thread where you can borrow some bitcoin but it need collateral for assurance that you will pay.
I generally avoid any loans and try to do without them, because I consider them a debt pit, from which it is very difficult to get out later. Only a profitable and sustainable business justifies the receipt of loans. Credits in cryptocurrency are doubly risky.