  As the core technology behind Bitcoin, Blockchain's decentralized,
tamper-proof, and traceable features make it the preferred platform for
organizational innovation. In current Bitcoin, block reward is halved every
four years, and transaction fees are expected to become the majority of miner
revenues around 2140. When transaction fee dominates mining rewards, strategic
deviations such as Selfish Mining, Undercutting, and Mining Gap could threaten
the integrity and security of the Blockchain. This paper proposes a set of
Dynamic Transaction Storage (DTS) strategies for maintaining a sustainable
Blockchain under the transaction-fee regime. We demonstrate that block
incentive volatility can be reduced through systematic simulation by applying
DTS strategies and avoiding strategic deviations. With DTS, public Blockchains
such as Bitcoin become sustainable when the mining reward is solely based on
the transaction fee.
