What's everyones favorite "conspiracy theory"?

I'm extremely interested in doing research on genetically modified organisms (GMO). Biotech companies aren't regulated enough in my opinion. Plus from a purely ethical perspective, is it ok that we are changing God's design?

I'm also concerned about cell phones and their frequency being used as a weapons to hurt people. The US government has actually done this before. It's less of a conspiracy theory and more of a "one time America did this".

Also Bitcoin being used to create one world currency so we're easier to control. This sort of connected to a new world order. Which I think may or may not be in the works.