How did caviar become the staple food of the rich? Why not, say, truffles?

Answer 1:

It’s not a “staple,” but it serves as a signal since it’s pricey. Truffles are, too, although they don’t keep as well as mushrooms. Because caviar can be delivered, it has become a global symbol.

Answer 2:

Nobody considers caviar to be a basic meal, in my opinion. Truffles aren’t something they’d consider a must-have.

I prefer the saltiness of caviar to the sweetness of truffles. Chocolate truffles, on the other hand, may become a regular.