Candide and his servant Cacambo endure many hardships until they reache Eldorado where they observe children in a village wearing tattered gold and playing with gold balls and gems as though they are mere stones. They are invited later to dinner at the first house they come to, a house built like a palace in Europe. When they offer to pay for their sumptuous meal, their host and hostess laugh at their efforts to use "stones" to pay them. (They consider the jewels and gold as worthless.) Clearly, there is abundant wealth and resources so that no one wants for anything.
While there is no specific mention of how people invest, Chapter XVII contains a line that states, "The other guests were merchants and carters." Evidently, there is no need for investments as there are boundless resource for people, and there is no crime or need for lawyers.