So you’ve built a sharing economy service. You’re ready to take it to market. But who should you start marketing it to first? Where to start?Every business needs to start somewhere. Amazon started by selling computer books to IT professionals. eBay started by helping collectors sell collectibles. The short-lived social network Tribe started by connecting people in the Burning Man community.A business’ initial market is often called a beachhead market. It’s where you start. If you pick well, you can expand quickly like Amazon and eBay did to other communities and categories. If you pick poorly like Tribe, you’re dead.The type of asset you’re helping