What is Cryptoeconomics & why is it important?

Could you elaborate on cryptoeconomics and its significance in today's financial landscape? Cryptoeconomics seems to be a blend of cryptography and economics, but how does it actually function? What role does it play in securing and sustaining blockchain networks, such as Bitcoin? And why is it so crucial in understanding the dynamics and value propositions of cryptocurrencies? Additionally, how does cryptoeconomics shape the future of decentralized finance and the overall crypto ecosystem? I'm keen to gain a deeper understanding of this fascinating intersection of technology and finance.