What is the ruling on investing Arab money in non-Muslim countries, while there are Arab countries suffering from poverty?

Wealth is a blessing that a servant will be questioned about on the Day of Judgment. Its gratitude is shown by earning it through lawful means and spending it on legitimate avenues, while its ingratitude is manifested by investing it in forbidden ways, such as usury. Investing money in Muslim lands indicates a Muslim's loyalty to his brethren and his concern for the welfare of his country, whereas placing it in the hands of disbelievers revitalizes their economy and builds their civilizations. This often occurs through usury, which Allah has threatened its perpetrator with war.