I haven't seen such money with large denomination. There is just a lot of zeros but it does not mean that it has a high value just like what you imagined. Not all currency has the same value. There are also other countries with this kind of currency. The value of their currency is much lower compared to the value of usd. But that friend of yours who said that its value is higher than Bitcoin, he's definitely wrong about that.

Just because there's a lot of zeroes on your banknote doesn't mean it has a high value. Most probably these banknotes are from a country whose economy is hyperinflated for them to print a banknote with that amount. Besides the country where the currency came from no longer exists so I don't see the reason why this is even debated.