On Thursday, the US president-elect reiterated that he is considering creating a national stockpile of the digital currency, similar to the country's strategic oil reserve.

It is not known how many chemical weapons Syria has, but it's believed Assad kept stockpiles and that the declaration he had made was incomplete.

They included fighter aircraft, radar and air defence sites, and naval ships, as well as weapons stockpiles, the IDF said.

On Monday, the UN's chemical watchdog warns authorities in Syria to ensure that suspected stockpiles of chemical weapons are safe.

Also, critically, U.S. officials expressed concern about Assad’s large stockpiles of armament, including missiles and chemical weapons, that could end up in the hands of the rebels.