If by viable you mean able to be implemented without enormous problems, I would argue that capitalism isn't viable. I believe anarchism would be better for more people than the status quo, so I'd say it's viable in comparison
Edit: to answer the other part of your question, I practice anarchism in my daily life. Anarchism, to me, is a value more so than a political ideology. I don't believe in hierarchy, so I don't perpetuate hierarchy, and I actively work to dismantle it around me