They say LaTex is done so the version number approach pi. Everytime they update it they get closer to pi

See https://en.wikipedia.org/wiki/TeX

Money is a promise given to you that someone else will be ready to give you something you want if you give money to them.

And you trust the money to be useful when you need to make other humans do stuff, it can be giving their time or owning something that you didn’t own before.

Money itself don’t have any value, it’s a pointer to anything of value. Without money it would be very hard to know exactly how rare is rice compared to sweater. But now using money you can know that you require same amount of human efforts for bringing 70 kg of rice as 1 pcs of sweater to the superstore.