What would you do if you had the chance to relive the late 90’s and play the bubble for what it was? Well, it may be that we’re getting close to that stage again. Earlier this week Apple’s valuation broke the $600M marker just like Microsoft’s did at the end of the last bubble (today Microsoft’s market cap is $260B). Also this week there was the Facebook Instagram acqui­sition — $1B, 13 employees, $77M average per employee, 15 months old, 5M downloads. If that doesn’t bring you back to the late 90’s…