I'm not sure I understand your question. If you are asking about the transaction cost of using smart-contracts on the blockchain. The increase in cost is primarily related to one of two things: the increase in data that is processed in smart-contract transactions over time, and the increase in the value of the transactional cryptocurrency.

The first is something you may be able to solve for programatically, the second is balanced against the corresponding increase in value of your holdings.

If you're asking about something else, please clarify.