All praise is due to Allah, and may peace and blessings be upon the Messenger of Allah.
It is established in the Sunnah that Satan may steal food, as mentioned in the story of Abu Hurayrah (may Allah be pleased with him) with the devil who used to take food from the charity provisions. The Prophet ﷺ informed him that it was a devil.
However, it is not permissible to definitively claim that the jinn are responsible for the disappearance of money and gold in a particular case without evidence.
The Prophet ﷺ is authentically reported to have said:
"Close the doors and mention the name of Allah, for Satan does not open a closed door." Narrated by Al-Bukhari and Muslim.
Scholars have explained that mentioning the name of Allah when closing doors prevents Satan from interfering with them. Among the means of protection is also regularly reciting Ayat Al-Kursi before sleeping.
Therefore, one should combine Islamic supplications and practical precautions, including:
Mentioning the name of Allah when locking the safe and closing doors.
Regularly reciting Ayat Al-Kursi before sleeping.
Changing the safe's combination code regularly.
Installing surveillance cameras and checking who enters the house, as someone with experience may be capable of opening safes.
As for recovering the stolen money and gold: Their return is logically possible, but we do not know of any specific Islamic method for retrieving something allegedly stolen by the jinn. One should frequently supplicate to Allah, asking Him to return the missing property.
If the money continues to disappear, and moving to another house is possible without causing greater harm, there is nothing wrong with doing so if there is a genuine benefit.
Conclusion: The disappearance of money should not be attributed to the jinn without evidence. Rather, material causes should be investigated while maintaining Islamic supplications, placing one's trust in Allah, and asking Him to restore the missing property.
And Allah knows best.