Be Part of the Governance
Cardano was already designed with sustainability in mind. The point was to create a system that governs and also finances itself without being dependent on donations. Cardano has a built-in treasury system that gets a constant stream of funds from transaction fees and treasury taxes. This is explained in detail in treasuries with Bingsheng Zhang -https://www.youtube.com/watch?v=Hyh3h_yX-S0.
Cardano Improvement Proposal
Cardano Improvement Proposals (CIPs) :https://developers.cardano.org/docs/governance/cardano-improvement-proposals/cip-0001/ are a way of formally proposing ideas in an agreed-upon fashion. While nothing about them is binding and not a pre-requisite for either treasury on protocol changes, they fulfill an essential aspect of Cardano governance. Before a decision can be made on anything, someone has to propose a setup that others can discuss.
Fund your project with Project Catalyst
Project Catalyst :https://developers.cardano.org/docs/governance/project-catalyst/ , Cardano's innovation platform is the current way to access the funds of the treasury system. It is seen as a stepping stone to Voltaire and aims to provide a safe and lively environment to explore the highest potential of human collaboration.
This content is from (https://developers.cardano.org/docs/governance/) and is included here so it can be translated.