I can't help but marvel once again.
In this society, for an ordinary person to earn 10 million is almost a fantasy, and it has nothing to do with whether one is hardworking. It's related to the structure of society—a society can function normally with a large number of poor people, but if there were a large number of people with 10 million, the society might collapse because of it.
But!
If you just enter a Hell Bus loaded with 18 people and come out alive, you can easily make 10 million, and that's just the baseline profit.
Just by casually picking up treasure chests in the first challenge, you can sell them for several million. Add to that the 100,000 Star Coins and some Hidden Occupation Transfer Books from the clearance rewards, along with D-rank random item treasure chests, and breaking 10 million is just too easy.