Developer documentation for the Maker System.
Deposit collateral to access Dai-denominated credit.
Autonomous borrowing - borrow Dai by locking up ETH in the Maker collateral vault.
Compete for profit opportunities provided by the Maker platform.
Opportunities for arbitrage across DAI - PETH - USD pairs.
Re-invest borrowed Dai to build leveraged positions.
CDP owners can use borrowed Dai to purchase more collateral on the open market, and then use that collateral to open another CDP, thus increasing exposure to changes in the value of the collateral.
It would be easy for example imagine to writing a contract that accepts ETH and gives you back a recursively-leveraged CDP or an ERC20 token containing a CDP, which would resemble a leveraged ETH token (think leveraged ETFs on NASDAQ).
Manage risk with Dai.
Buy Dai as a shelter from volatility. Exchange crypto-assets for Dai during periods of uncertainty.