If you want to use Bitcoin without it being traceable to you, one way is to create a wallet using a 12 word master seed using a client side program on a burner computer and then find someone to buy the bitcoins from and have them deposit to one of your addresses created using that master seed. A new address can be created for each deposit received, all using the same 12 word master seed to recover all the addresses.
I've also heard about Bitcoin tumblers, which is like laundering the Bitcoin so it can't be easily traced back to the original source. So you may want to incorporate that in there somewhere.
People are still using Silk Road websites successfully and the only way people are getting caught is if the seller on the website is an informant or agent. For the most part, the government isn't tracking this stuff. What does the CIA care if a billion dollars of drugs are sold using bitcoin?
The feds care because they want the opportunity to seize the money. The feds seized 5 billion in 2015. I have had clients hire me as an expert witness who owned pipe shops for years with no problem. As soon as they had a million or more in the bank, the feds raided the shops for bogus reasons and seized the cash. My last one was a few months ago where the feds seized 3 million. It's all about the money.