Why is it becoming increasingly difficult to make money in the cryptocurrency world?

The cryptocurrency world is like a dynamic system: initially, the entropy value was extremely low, and the industry thrived and expanded wildly; as time passed, entropy continued to accumulate, opportunities visibly decreased, and making money became increasingly difficult; now, entropy has nearly peaked, and the window for making money is almost closed — fewer players are attracted to new models, the money-making effect is getting weaker, and the time that can be sustained is getting shorter.

Just like in 'The Three-Body Problem,' when the crew of the Natural Selection talks to a four-dimensional object: 'The fish that dried up the sea are gone; the fish that dried up the sea left for the next dark forest before the sea dried up.' Most of the people who achieved financial freedom through cryptocurrency in recent years have exited — at least they no longer need to scramble for opportunities, trading spot and making investments is comfortable enough; for those who haven't made money, the opportunities available in the future will only get fewer; for someone like me, who earned money but squandered it all, trying to find opportunities again means just watching helplessly as the cryptocurrency trend fades away.
Few people notice that the cryptocurrency world has long played out the traditional financial models accumulated by humanity over thousands of years. Issuing coins (equivalent to printing money), opening exchanges, creating stablecoins (similar to the Federal Reserve and the dollar system), engaging in lending (comparable to banks and their affiliates), as well as staking, instant exchanges... The gameplay has even replicated traditional methods: airdrops, invitation-based expansion... I remember a period in American history called the 'Free Banking Era' (1837-1863), where anyone could open a bank and print money at will — and since the inception of the ERC20 protocol, the cryptocurrency world has almost mirrored this history.
Today, the entropy increase in the cryptocurrency world is approaching thermal equilibrium; this once blue ocean is about to dry up. It's time to come ashore and look for new waves.