I see the future without mining. But still you should not deny that it will always be.
mining most likely will not disappear, still some kind of coin will be mined,there are countries where cheap electricity and mining will work there
You keep in mind that the complexity of mining is constantly growing. In a few years, it will be as difficult and impossible to get Bitcoin for a large farm as it is to get Bitcoin on a home computer now.
While difficulty grows, compute power also grows. If difficulty grows too quickly (as it happened recently with all coins due to hype), the tech is left behind
and you need to double the number of compute units. That makes the price go down, and diff to stop growing (as it happens now) or even go down for unpopular coins.
The next wave of new compute hardware will again boost the numbers. It's always a chase game.
In any case, technology needs to be developed, and quickly and correctly. And this world requires professionals with completely different abilities