Find an article about events that you think will impact the future in a significant way and, when you post your article, also post a profitable business you think could be made out of that future event. Additionally, when you post, include the following information:
The number of people impacted by the event you are describing
The size of the impact on each person from that Event
The amount of time involved (e.g. will this happen in 1 year? 100?)
The probability (i.e.) how likely you think it is the event will occur
Give the TAM/SAM/SOM for your business
Identify barriers to entry you may utilize to keep out competition.
