I don't know if the food will be fresh or will exist at all.
Why not!
I've read that the stocks of flour are not great, I've read that some hotels said - about one week ago - that their food supplies are for one more week only.
A rather big part of the food use to come - from any country - from other countries. This is what supermarket chains do. And since the money control, this may be somehow disrupted.
However, I am also sure there will be no problems with the Feta and the fish supply, so the situation is not that bad

I don't know if the VAT will rise until I'll get there.
Yes, the VAT is increasing 10%!
Allright. Starting when?
I am scared that there may come strikes and there will be no place where to buy gas (already had that experience once, about 5 years ago).
So far there is no large strikes!
They don't announce them so much ahead, so .. yeah, there's some risk. But I plan to refill in Macedonia and whenever I can, to be on the safe side.