I wrote something on this topic a while back on Malware Tips when the information was fresh, and I provided a link I don't have now. You could probably find my earlier comment by searching.
An author giving a lecture on C-SPAN II asserted this: Tor was created by the US intelligence community. When one goes on Tor, rather than escaping the attention of the US intelligence community, one arouses the attention of the US intelligence community.
So see how you feel about that. Personally I don't have a poor view of the US intelligence community, but I recognize it can have bad actors like James Comey and his clique which featured characters like Peter Strzok. I wouldn't take it for granted that when I cross paths with the US intelligence community I will be dealing with the majority of good guys and not with the minority of bad guys.
It occurs to me now also that if the US intelligence community monitors Tor there is no telling how many other countries' intelligence services do the same.
Now I cannot guarantee the above assertions. Not everything said by published authors who have studied a subject turns out to be true. But there's a significant likelihood this is true. If you're curious you could find my original post with its link and see if you can get the author's email address and try to pick his brain.