Stark has a small business. His business has an undisclosed amount of crypto tokens as assets. Unfortunately, Stark’s laptop suddenly stopped working, and he will now need a new one. The dilemma that Stark has now, is whether to sell some of his ETH to buy his new laptop or keep his ETH because he is bullish about its long term potential to be worth more. gDAI doesn't want you to have to choose. By using gDAI, Stark can deposit 1 ETH in a vault and borrow stablecoins against that collateral to purchase his new Laptop. Stark gets his new computer and gets to keep all of his ETH. So, if ETH prices increase next week, Stark will still be able to realize those gains. Meanwhile, the gDAI stablecoin Stark took out against his collateral can be paid back at any time and do not incur any interest.