Answers
On
Mary Tsiganou answered:
Greece recognizes the dual citizenship and there is no restriction to this.
On
Stilianos Proestakis answered:
In Greece you could keep your dual or multi-nationalities, but you couldn't obtain more than one EU member-state nationality.
On
Penny Konitsioti answered:
Please be aware that there are no restrictions in obtaining a Golden Visa in Greece, even if you come from the Middle East.