1. Who controls these companies if everything is fair?
2. Do these companies also have a kind of corporate council where coin holers are allowed to check the finances if everything is financially correct?
Depends on the company, some are so shady you don't even know where the company is and an audti is the last thing they are going to do
3. How should these companies make money, nobody works for free?
Fees when you buy their "stable" coin or when you change it back to fiat.
4. Why do they use stable coins when we are not needed? In the Netherlands we have a kind of coinsbase. Litebit. A company officially registered
with the chamber of commerce. There you can sell crypto for euros but also for credits that you can buy back when you want.
Faster movement of coins other than fiat.
You can sell eth on binance get usdt go to whatever buy bitcoin move to y...so on in a matter of minutes
5. Why do not these stable coins have a normal contact address?
6. Where is their office?
7. Why do not those stable coins have a phone number that you can call for questions?
8. Why are their registration data hidden from their domain name?
In most cases when there is no info is because they don't want to leave traces behind.
9. Why do not stable coins need ico to start something while almost all other coins want millions to start the simplest things?
Lambos are not free or cheap
10. Why do exchanges use their own name for their stable coins?
Advertising and a proof of "trust".
11. Why do not exchanges use a kind of system that you can sell for credits?
No idea what you mean.
12. Technically speaking with normal currencies you have a winner and losers. In crypto the winners are this moment the stable coins. If bitcoin will rise enormously again, these will be the biggest losers. How can stable coins survive bitcoin rise again?
Stable coins are not winners or losers.
Stable coins will always have the same value or are intended to do so.
Their only enemy is inflation, not cryptos.
I think people tend to underestimate how much stablecoins are worth and how profitable they are.
Earlier this year, tether destroyed $500 million dollars worth of their own supply. I can't speak for their motivation but the impression I got is they did it in an attempt to make tether a more scarce commodity and elevate its price back up to $1.00.
Or they did that because somebody sold some tether back to them and they had no buyers.