What kind of bubble is Gamestop?

And how can you decide when to sell?

"The Flaming Lips Performing at The Boulevard Pool at The Cosmopolitan of Las Vegas" by The Cosmopolitan of Las Vegas is licensed under CC BY-ND 2.0

I love GameStop. Stepping into that little video game store feels like stepping into a comfortable, familiar piece of the past. The rows of plastic-wrapped game cases, the awkward young nerds at the counter,…