"They're coming up with things like 'Cannabis Crawls, ' going from dispensary to dispensary and showing you how to get there and providing you with food and transportation along the way, " Bricken says.

CNN: Seattle's budding economy: Pot tourism

Despite the uncertainty, Bricken says companies are still rushing to join what she calls the "secondary risk market, " the modern-day equivalent of Seattle's early entrepreneurs selling pickaxes, supplies, and services to prospectors seeking their fortune during the Yukon Gold Rush of the 1890s.

CNN: Seattle's budding economy: Pot tourism