Initially AI will create a lot of jobs exploiting its new capabilities, but as it improves it will also be capable of taking on those roles. The entire point of an AGI is that it is as capable as a human (and then eventually more competent).

Things worth bearing in mind:

1. Once a machine exceeds human performance in a task, humans never regain the lead.

2. Technology is progressing, not staying still, so machines get better over time whereas humans as a species aren't improving at the same rate

3. Humans don't operate on magic, so eventually everything we do will be replicable.

At some point the work available will be purely about the quality of human to human interaction, which will retain value just as hand-made still has a place in the market for manufactured goods.