Why is this the answer?

The answer is oil because this clever riddle uses fun secrets to describe an incredibly important thing we use every day, which is sometimes called petroleum, or crude oil. The first line says, "I am the fountain from which no one can drink." A fountain usually has water for drinking, but oil is found deep down under the earth. People drill wells deep into the ground to find it and bring it up to the surface. It flows out like a fountain, but it is not for drinking. Oil is a thick, dark liquid that is poisonous, so it is definitely not safe for sipping. That is why the riddle uses the word "fountain" as a trick, because this powerful liquid is used for so many other essential things instead of just being water. Next, the riddle calls it a "necessary link." Think about all the ways you get around. Cars, big trucks, trains, and even airplanes all need fuel, and that fuel comes directly from oil. This makes oil a necessary link, connecting us to where we need to go every day. It also keeps us warm, as many homes use heating oil to stay cozy in the winter. But it is not just fuel. Oil is also used to create plastics, which are in your favorite toys, phone cases, and many fabrics. It truly links the raw material from the ground to the many inventions we rely on every single day. Finally, the riddle says, "Like gold to all I am sought for, but my continued death brings wealth for all to want more." This means that oil is very, very valuable, just like a shiny piece of gold. People search for oil all over the world because it is so important and they can sell it for a high price. The riddle calls the use of oil its "death" because when we burn the gasoline in a car, that oil is used up and gone forever. But because the world needs this energy so much, the companies and people who find and sell the oil make a lot of money. That is why oil is something that continues to bring wealth and why so many people want to find it.