Let's assume he keeps winning and dominating the field, and maybe even break the 1500/Mile WR. Let's say it happens in the next 2 years.
Do you think he will stick to the 1500m "for ever", or as soon as he accomplishes everything he wants, he will move up to 5000/10000.
Do you think if he becomes the 1500M WC in 2022, and breaks the WR in 2022 or 2023, that in the 2024 Olympics he will stay in the 1500, or he will be on the 5000/10000 ?