It would help to give us an idea of how is "crazy." Prices vary a lot depending on where you start and how many continents you visit, and of course which class. For example, the base fare for a first class 22,000 mile Circle Pacific starting in PHL is $12,700, while a six-continent first class starting in PHL in first class is $19,399. A 3-continent business class booked into I inventory starting in PHL has a base fare of $8,699, while a 6-continent business class booked into D starting in PHL has a base fare of $13,599. That same first class 22,000 mile Circle Pacific that is $12,700 base fare starting in PHL is $7,545 starting in Hanoi. Lots of differences, as you can see, and a place that might be the least expensive in one case might be midrange or on the higher end for another case. Many people use miles or buy cheap fares to get to where they want to start.