If I took the BTC from the signature campaign (chipmixer) and sent it to an exchange that just required an email address and converted it to a cryptonight coin then withdrew it to my wallet, sent it to another wallet and then to another exchange that once again just required an email address I think we can all say that the ability to trace anything at that point would probably be impossible. Now I have my private BTC. What do I do with it? The second I buy anything that requires shipping well there goes privacy. Yes you can drop ship someplace but unless you go to the 'we don't ask' mailbox location there is still a trace. OK, lets not buy stuff that needs to be shipped. How about gift cards from bitrefill or coinsbee? Well if you get a chipolte card get a burrito with it, they know something about you and where you got your gift card and where you used it. And so on.
-Dave
if your really care about your privacy then used a dummy email when it comes exchanges.. And if it's possible to covert your crypto into real fiat probably much better, so that when you're buying any stuff online you don't need to worry.
Actually that's what I'm doing everytime i earned crypto here in forum and with the help of my digital wallet "coins.ph" it's so easy to convert crypto to fiat within the wallet. But I'm not using the same wallet for making transactions online such buying stuff.. Wherein i used another digital wallet for it and that's where my money always out everytime i need some cash..