Startups like Salt Lending, Nebeus, CoinLoan and EthLend have all started a new industry by making loans to borrowers using bitcoin as collateral; with the world of bitcoin millionaires growing they will need to buy houses or cars and being able to secure a loan by putting up their bitcoin will allow then to make these purchases; securing a loan for $100,000 could cost a borrower 12 to 20 percent in interest and $200,000 in bitcoin as collateral; the loans could help bitcoin miners secure funding and potentially compete with P2P lenders; it is still early days but the potential is there as more byproducts are coming to light in the bitcoin craze. Source.