You're probably right (and you'll remain right if "Soros" is replaced with the name of many, many people), but I don't think you're the kind of source the grandparent asks for; I think they wanted evidence that Soros shorted the euro or something similar.

Even if he's short the euro, it kinda seems that no single famous, connected billionaire can make or break the euro. It's, like, a really, really big, erm, thing. He ought to believe his bet to be correct rather than hope that him talking about it will move the market very much. So if he's indeed short the euro, I'd guess you're hearing his true opinion (which doesn't make him right, it's not like he's never lost money, it just probably means he's honest in this particular instance.)