Restaurants connect all worlds? Is it reasonable for me to earn one billion?

Description

After binding the food system, the back door of Shengjiu restaurant leads to another world.
The first visitor from another world brought her a crab claw taller than a human.
Sheng Jiu: This ingredient is a bit exciting!
The small restaurant on the corner of the street soon launched new products: steamed shrimp dumplings and fried crab rice.
All kinds of tempting fragrances constantly attract diners.
Diners commented after dining: Although it is expensive, it is delicious, but the efficiency of serving is not good.
Sheng Jiu: Why don’t you catch crabs?
As more and more worlds are opened, the ingredients are getting better and better.
The restaurant staff are also increasing...
Looking at the big guys from all over the world who were busy in the restaurant, Sheng Jiu was nestled in the corner and roared silently: In our world, there is only one object, one, one at a time!