Overstock.com Inc (NASDAQ: OSTK) has been around a long time, at least relative to many large, discount online retailers. And its CEO, Patrick Byrne, always has been an out-of-the-box thinker. Overstock was one of the first companies to accept the then nearly unheard-of bitcoin as payment. Since it went public in 2002 — after the dotcom bubble burst — OSTK stock has seen its ups and downs. And a very long period of neither. But it has endured. Until now. In the past 6 months, the stock has...