Since many people try to convince us that Bitcoin is a bubble and how we will lose our money eventually, I wonder if money is not a bubble actually. There exist economies in which money has a positive value in spite its market fundamental is zero. That means fiat money has zero value. Fiat money is a social contrivance. We take money from other people because we know other people will take it from us. In theory and practice the fiat money is a bubble.
The thing is that every currency eventually will bring forth bubbles. With fiat currency, you have a higher chance of this happening due to its unlimited supply, and even more so, when their value is derived from factors such as the stability of the issuing government. On the other hand, and although it´s not immune to bubbles, currency tied to commodities tends to be much more stable due to their limited supply. So, you can say that fiat currency still has a perception-based value, since its valid due to a necessity of keeping the current economic system wheel going, and that it can create bubbles that depending on the country they eventually burst...