Using a prepaid card outside Egypt depends on the card type, the issuing authority's rules, and the international limits in effect at the time of travel.
Some cards are local only, while others are international with different terms and limits.
Before traveling, check the network name on the card, enable international use, purchase and withdrawal limits, and currency exchange fees.
Don't assume that just because a Visa or Mastercard is a card, all international transactions are available.
The figures, fees and limits in this answer vary by bank and change over time — confirm them with your bank or the official source before acting.