Do not get involved with anyone asking you to change Euro's or English pounds for Egyptian - they will tell you that they can't go to a bank etc.
They will scam you with a flick of the wrist.
Also the new 1 Le pound coins could easily pass for a 1 Euro coin (at a quick glance)
ADVICE is DO NOT GET involved, however genuine they appear.
What is even more annoying these people want thier tips or payment in English or European so they can pull this scam on tourists.
DO NOT GET INVOLVED, ITS NOT YOU PROBLEM.