That's why I don't have Euros here in the US... However if I went to Europe I could pay for gas, rent, and food with Euros. I can't pay for those anywhere with bitcoin.
Also, I believe the topic says "Why do people trust in fiat money?" not "Why do people trust in Euros?" or "Why do people trust in USD?" It is implied that when someone says "fiat" they are talking about the government issued legal tender, ie; what people actually use. There is no country where fiat is not accepted because it is the official, legal tender of a country.
There is one country that accept bitcoin payment, but this country does not physically exist, in fact it exists everywhere on this planet where people accept the bitcoin payment. And this country's economy is growing at an amazing speed
The "value" of the bitcoin economy is increasing... If you measure it in fiat. A bitcoin is worth $100 only in USD. If measured in material goods it is worthnext to nothing, as you simply cannot buy all necessary items with bitcoins. Until this happens it is
impossible to have a bitcoin economy.
There is no bitcoin economy or dollar economy, there is really one world economy which is sometimes divided due to tariffs and monetary controls. The money that is used, is simply the best money available to the traders. We think that bitcoin is the best money ever by traits, except for a few fringe trade scenarios. If you don't see that, it is ok for me, just sit back and let it happen, and start using bitcoin as the last user. The bitcoin enthusiasts here see that, buy into bitcoin before the rest, and take a nice profit.
A "few fringe trade scenarios".
Here are some minor annoyances that come up when buying bitcoins (I already said this, but it has to be said again):
I go to the grocery store, pick out my stuff, go to the register.
Me: Hi, I'd like to pay in bitcoins.
Cashier: What
I go to Irving to get some gas.
Me: Hi, can I pay in bitcoins?
Cashier: What
I go to my landlord to pay my rent.
Me: Hi, can I pay this in bitcoins?
Landlord: ¿Que?
Currently, the only "profit" that is to be made is in fiat. Like I already said, even if bitcoins went up to 1,000,000 today it wouldn't matter because I can't buy any necessities with them. My only option to get rich would be to cash out.