20-Year Prospect
While job growth in the field remains slow at 5% (source), there's still certainly a need for butchers in our communities. Even if technology prevails and meat is more commonly cut by machines, there are elements of the butcher's career that can't be replicated by a machine.
From customer service to inspecting each selection for quality assurance, there's a human touch to butchery that would be hard to do without. This all comes back to mastery of one's field. If you can chop those chops and tell the customer how to cook 'em to perfection, you're bound to be in demand. Let's see a machine multitask like that.
If you make it into this field, the one thing that might drive you out is burnout. Working those long hours puts a real toll on your body, and living on $28,000 a year (source) can be rough. If you can tough it out, though, then there's no reason why you shouldn't be able to be a butcher for the next twenty, thirty, or even forty years.