Europe's Audioboom, which focuses on delivering spoken-word content, is climbing to the top spots occupied by American social media companies.
Russell Brand helped Audioboom gain about 200,000 registered users and 150 new content partners after promoting the platform.
Public speaking is a lucrative post-retirement job. Former US President Bill Clinton is reportedly the highest earner in this industry.
Podcasting has altered the way news is disseminated today because of citizen journalism.
Investing in these "emotional assets" may prove to be lucrative in the future, because the items are rare and in high demand.