Or on a smaller scale, yes a conspiracy existed to assassinate President Lincoln. However, the "conspiracy" was limited to one man and a couple of associates. Sadly, they hanged the owner of the boarding house where he lived, just to be on the safe side.
Most conspiracies are like that - small groups of people conspiring together to do one thing, and then quickly doing it. The assassination of Ceasar, for example. Long-winded and long-time conspiracies, spanning decades and involving thousands of people are simply not workable, as someone eventually would spill the beans. And as I have noted before, our government just isn't organized well enough (or staffed) to run any major conspiracies. If you doubt this, spend some time at your local post office. Or think about your time in the military - and the people you worked with. Could they really run a major conspiracy? They can barely conspire to make a pot of coffee at 6 AM. Be real!
Take the "Clinton Death List" - which is a prime example of how conspiracy theorists work. Some of the names on the list are people still alive, so they couldn't have been killed by the Clintons (made-up evidence). Other deaths are just listed as "suspicious" which makes it sound ominous, but no reasoning as to why it is suspicious is given. Trivial "inconsistencies" (also often made-up) are touted as "proof" that someone's death was unnatural. Coroner's reports and other evidence is simply disregarded. Dead people are listed as being "linked" to the Clintons, when the links are tenuous at best - if they exist at all. And of course, the underlying thing that is disregarded is that if you live long enough, a lot of people you know will die. So it is not unusual that the Clintons, now in their late 60's, know a lot of dead people.
I am only 55 years old, and yet my grandparents, parents, my sister, several friends from high school and college, and some co-workers and acquaintances have all died. Clearly I must be a serial killer. I started with Grandpa (who died of "old age" if you believe the coroner report! These things can be faked!) and worked my way from there. Even more damning is that when Grandpa and my parents died, I stood to inherit which of course gives me motive for the crime. A fellow Patent Attorney I knew died of a "heart attack" (always with quotes, of course) one day at work. A little Potassium Chloride, in an easily concealable injection could do the same thing, of course. Obviously, I had motive to murder him, as I wanted to steal away his clients! The fact that I was in another city at the time is irrelevant. Alibis can be bought, you know!
You see how this works. You can create any conspiracy you want to, out of whole cloth. And most are.
And not only is it a surefire one-way trip to personal misery, but financial as well. Mentally ill people do not live as long as the general population, and are at far higher risk for becoming homeless and destitute.
Stop believing in silly nonsense and walk back to reality. It is an essential first step to take to financial freedom.