Yes, but even highly respected organisations come up with the most dire predictions that never come true.
The IMF predicted economic meltdown if we didn’t join the Euro. Not only did that not happen but it was a massive advantage to us when the economics crisis hit in 2008.
The predictions before the referendum were terrible too. A Leave vote would result in instant recession, with soaring unemployment and inflation. None of it happened, in fact employment levels rose, and inflation has just reduced slightly.
Don’t imagine for a minute that staying in the EU is going to be safe and cosy, although I admit that trying to find any news about everything that is going wrong over there is utterly impossible to find in any British paper.
Merkel’s position of authority has taken a massive hit and Macron is becoming much more influential, this is massively pissing off other members, especially Holland, which has a big problem with Euroscepticism. Italy has just voted in a lot more Euroscepticism, anti-migrant parties into their parliament, and they still don’t have a government. Greece still has debt around 86,000 billion euros, which it will never be able to pay back.
There is plenty more over there to worry about too, not least the upcoming accession of Albania and Macedonia, two more basket cases wanting handouts.