cash is king

0:01 only one thing matters at Spa, Belgium. at the formula one testing circuit, speed is king. スピードが命

This startup is trying to reinvent the piston engine

https://www.youtube.com/watch?v=t3IyKf5rjFA  0:13 in this economy, no one is giving credit, cash is king.現金払いがすべてです。
Cash running short in Greece

https://www.youtube.com/watch?v=GpDQud4VIvk  0:35 his family had come to Hershey from Jamaica to cut cane when sugar was king. 砂糖の黄金時代に彼の家族はここでサトウキビ栽培をするためにジャマイカから移り住んできた。
Investors flock to Cuba as country opens up

練習問題解答
a-4142 was king
a-4358 cash is king