Being worried about this new era. We are bound to digital worlds and forgotting the needs of our physical world.
If our farmers, fishermen, and other workmans that focus on agriculture would know how to gain bitcoin, will they still do their profession? However to some country, this is not a profession but a job to earn money. And if they learn about bitcoin, will they be able to continue earning from their hardworking jobs?.
What can you say about this?
First of all, you seem to be lost in a false dichotomy and are trying to solve a non-existent dilemma. Having a profession (i.e. being qualified to do something) allows you to be hired for a certain job, but it is not a job in and of itself, nor is it its lack. In simple terms, you are comparing apples and oranges, while they are as different as chalk and cheese
Further on, you are asking wrong questions. It is not so much about farmers, fishermen, and other people of similar occupations as about everyone, whatever activity they are involved in. Bitcoin can only exist as an addition to fiat, without fiat it will be useless as its lacks features that would allow it to be used instead of fiat
The lesson to take home is that you can sleep tight as Bitcoin and crypto in general don't threaten either farmers or fishermen (or fiat itself)