*Example: Alice owns a CryptoPunk. Bob owns 30 ETH. Alice and Bob both sign a Promissory Note that gives Bob's 30 ETH to Alice for a period of 90 days, while simultaneously locking Alice's CryptoPunk into an escrow contract. If, after the 90 day period, Alice does not return Bob's 30 ETH (Principal) plus 1 ETH additional (Interest), Alice's CryptoPunk will be released into Bob's ownership. *