They are designed for giving, tracking and playing. It is based on:
ERC20 Protocol CKr unit of value - they are a precursor for storing CKr on minted Coins
Minted Kred Coins that use the ERC721 Protocol and are stored on either the Stellar or Ethereum distributed ledgers
A Kred Coin is not a cryptocurrency - it is not a non-fungible collectible crypto asset. Each Coin derives value from the Moment it represents, its Circulation Trail and the social capital that comes with holding, trading or gifting the Coin.
2 CKr are free per signup (limit 5 million CKr). As of August 1 2018, you can buy more CKr in $1.00 USD lots (this price may change).