Of course, gold – the best indicator of strength. It is a metal which is stored millennia and will remain many thousands of years later. Gold items were found safe and sound in the tombs of egyptian pharaohs and scythian burial mounds, so that gold coins and items still retain their value. And bitcoin for the most part does not exist in physical form – except for the dollar, which is issued in the form of banknotes. For such goods, value is determined only by the resilience of the financial institutions that issue them. The currency can easily disappear with the state that issues it.