Financial characteristics are inherent in every blockchain. A proper economic model is one of the fundamental elements in a blockchain ecosystem, and a key factor for its success. We have learned from our business partners, especially corporations and enterprise business owners, that one of major obstacles to adopting blockchain technologies is the unpredictability of the cost of using blockchain, thanks to the volatility of cryptocurrencies. To tackle the problem, we design a bi-token system that includes the DeltaChain Token (DTC) and DeltaThor Token (DTHO). The function of DTC is to serve as value-transfer medium, or in other words, smart money, to enable rapid value circulation within the DeltaChain ecosystem. On the other hand, DTHO represents the underlying cost of using DeltaChain and will be consumed (or, in other words, destroyed) after on-chain operations are performed. According to our design, DTHO is generated from holding DTC with a constant speed. In this way, we are able to detach the direct cost of using DeltaChain from the DTC price. Let be the amount of DTC, the amount of time (in terms of the number of blocks) and the DTHO generation speed. Mathematically, we can write