The most economical way to travel around the world is to buy a round-the-world RTW plane ticket through a single airline company

True. Buying a round-the-world plane ticket through a single airline company can be the most economical way to travel around the world, as it allows travelers to visit multiple destinations with a single ticket at a discounted price compared to buying individual tickets for each leg of the trip. However, it is important to do research and compare prices and routes to ensure that the RTW ticket is the best option for your specific travel plans.