Saving dollars fearing other currencies might be affected by the riyal's decreasing value

Q 3: Many people keep their money in US dollars for fear that the riyal may affect the value of other currencies. Is this permissible? It is noteworthy that it is the kafirs (disbelievers) who benefit from the interest.

A: This is permissible. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.