“We’re going to see a new type of economy emerging where people can start to take ownership of their data and monetize on their data. And that is only possible

“We’re going to see a new type of economy emerging where people can start to take ownership of their data and monetize on their data. And that is only possible through the blockchain.” - What about the blockchain makes this possible? What's stopping another company from getting access to your data and then simply selling it on to others?