AFP/Getty Images The Korean War Memorial in Seoul includes replicas of a North Korean Scud-B missile and South Korean Nike missiles.If war breaks out with North Korea, we’ll have bigger things to worry about than our portfolios. But that’s OK, because doing nothing is almost always the best investment strategy during a geopolitical crisis. Such crises inevitably lead to panic selling, and it’s never a good idea to sell into a panic. In fact, for the contrarians among you, the panic lows set in the wake of a crisis are far more often than not a good buying opportunity.via