Easy, because if you hadn't got the funds on it, you couldn't place the order.
And if you would exchange in crypto currency, well, very simple, then you are exchanging crypto currency that (in this moment) have nothing to do with fiat, f. ex. you are exchanging an apple for an egg.
Exchange fiat <-> crypto only possibly if there is fiat in the system. The exchange is not converting your coins into fiat but displaying buy/sell orders from people. How do you buy fiat by selling bitcoin on an exchange if there is no fiat sell order?
And also, you cannot "cash out" USD in EUR, you have to exchange it the same way. Nobody wants to sell EUR, e.g. no EUR sell order, then you cannot buy EUR with your USDs.
(Edited a lot, to fix buy/sell mistypes)
Pretty sure you don't know how banks and exchanges work. It's a number, the only time they're required to have actual FIAT is when you make a withdrawl to a bank account. Banks for instance can spend your money (that's half the reason it's profitable) and since the bank runs are required to have a certain amount of currency on hand at all times. You can have a number in a bank and absolutely no cash associated with it.
Pretty sure I also specified an exchange... but you know if you want to think I meant removing USD Euros I guess...
As far as the exchange is concerned it only needs real 'FIAT' when it's transferred out to a bank account. Lets say I buy BTC in USD and then decide I want to cashout in Euros, how do you think that works? It would be a net loss to your 'zero sum' system. How they actually get real FIAT could be a combination of different things including exchanging BTC on other exchanges for FIAT.
Same could be said about me transferring BTC into BTCe and then pulling it out in USD. There is no way exchanges could function if their rates were based purely on how much FIAT they have on hand. People don't need to buy BTC with FIAT in order to use an exchange.
Why do you think Coinbase takes so long for withdrawls sometimes? They don't have a fort knox of gold on hand... or in our case USD.
Well, it's generally expected that the exchange is supposed to be
solvent, that is, every Dollar or Euro or Bitcoin in a customer account should be backed by the exchange. Sure, when I sell to dollars, I often don't want to withdraw to a bank account... but many do. BTC-E could try to pull a Poloniex/Bitfinex move and essentially not have fiat banking, and just offer USD-Tether markets. But now that it's clear that the feds intend to shut them down (not just take a $110mm fine and let them operate with new AML procedures), it just doesn't make sense. I really hate to say it, but what makes the most sense for the owners is to simply disappear....
Nah... No it's not. That's just something that makes you feel good inside. Even banks in real life only do that up to a certain extent.
And yup, as I mentioned earlier that's pretty much what they already did... It's just USD/Euro were MARKETS and not actual gold knox backed FIAT. You can call Crypto markets USD and Euro, it doesn't mean there is a real dollar or euro there. It's all numbers.
I know this is a 'mind blown' sorta deal, but your money in real life works the same way.
Like I mentioned if they're actually rather shady and this is legal action - they'll be back as they're very professional. If this was legal action and they're complying it's probably all getting seized, not that we should have our assets seized.
Look at it this way. The feds seized a bank. When have you ever heard of a bank getting seized in real life because one of the owners was being fraudulent? You can't. Because you're essentially taking someone elses money. Even if some of it was dirty, there are plenty of people (myself included) with clean money on the exchange. Kinda the shitty part of living in the wild west of cryptos. Government (who knows almost nothing a about crypto) can essentially have a LEGAL bank heist and then not give two shits about whose money they're taking.
This sorta thing wouldn't fly if it was a physical location locals have their money at.
So if this is legal and the owner was doing something illegal, I agree with what they're doing. But since they're essentially just stealing from plenty of legitimate and completely ordinary people I really fucking hope BTCE comes back.