How can airlines make money when the cost is so high? Are they all losing money?

The cash flow is very large, and many other financial investments can be made. Sometimes there is another kind called market.

Share, similar to market share, can also make money, forget how to operate. . . I studied Qantas in Australia when I wrote my thesis before. The profit is very low, and sometimes there is a slight loss, but its share price is still rising. . . . I forgot all about it. I can't answer it.