North Korea is at it again.

The antagonistic country claimed on its state run news station Sunday that it has tested a hydrogen bomb. It marks North Korea's sixth nuclear test ever.

North Korea is days removed from firing a missile over northeastern Japan.

The country's actions have put the spotlight on owning gold -- the yellow metal has popped about 5% since early August to $1,324 an ounce. 

TheStreet's founder and Action Alerts PLUS portfolio manager Jim Cramer said recently the best gold stock to own is Randgold Resources (GOLD) .

Randgold shares are up 33% since the start of the year.

Cramer said gold is the true reserve currency in situations like this where global uncertainty is heating up. 

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