The only way an IPO makes sense is if they're going to raise money to compete with the Apple Watch or to move into a completely different product category.
I just don't think a pedometer gets the job done. I think the winners in this space will be much broader, multifunction devices. Something like I expect to see out of Apple Watch 3.0.
The problem is competition. FitBit's only hope, in my opinion, is to create an Android-based/compatible multifunction device that becomes the competitor to the Apple Watch.
Can you give more details on your story? I'm particularly interested in how much you needed to retire, and how you've set everything up to make yourself comfortable that you won't run out of money.