We may already have reached peak hacker, at least in the number of coins nickable. In future exchanges will be run by actual professionals who are held to certain standards. Even today after all this time there are still places like Coincheck that are wide open. That won't happen in future.

Also tracing hackers will become ever more possible as law enforcement techniques become more sophisticated.

The richest people involved in crypto in the future will be exchange owners. No matter what direction the market goes, people still want to swap coins. And I'm not convinced decentralised exchanges will be adopted by Mr. Average for fiat swappage at least.