End of US dollar as world's reserve Currency | Where to invest for future ?

This video explains how the end of US dollar as world's reserve Currency is near, the dollar is weakening day by day as against the gold, losing its trust and strength, that's why many countries are now adopting alternative ways for mutual trade bypassing US dollar.
China, Russia, Brazil, South Africa are the countries where their banks settle the terms and conditions for mutual trade, they either held some amount of each other's currency and settle that way or they sell oil etc. in exchange for other goods.
So, the more you print dollars, the more it losses value and the more gold and silver appreciate. at the end, the fact is that all fiat currencies have no permanent value.
World have to introduce new monetary system to save the economy otherwise, we are at the verge of biggest crises, which we never seen before.
If this happens, how can we protect ourselves from its deadly affects..?
Where to invest for future to protect our money ?
I think the best option is to invest in gold and silver.