There is no alternative. Really, all other currencies are just trailing the US dollar as the world leader in printing. However, yes, the world is sick of using

There is no alternative. Really, all other currencies are just trailing the US dollar as the world leader in printing. However, yes, the world is sick of using the dollar only. If another viable alternative shows up and erodes only 10-20% of global transactions, the US dollar will decline rapidly. The only way I can see this happening today is with Euro growing balls to buy oil in euros only or island nations around China using Chinese yuan.