Gold is hot again.

TheStreet's founder and Action Alerts PLUS portfolio manager Jim Cramer said 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. Gold closed above $1,300 an ounce on Monday for the first time of the year. 

Monday's North Korea missile firing sparked a bizarre safe-haven pile on in currencies, too. 

"People want to own the yen but it's obvious that we have to worry about what happens if North Korea tests a missile and it doesn't go over Japan and it stops in Japan -- so I question the yen's reserve currency status here," Cramer noted.

Watch all of Jim Cramer's latest videos, right here:

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