But here comes the most intriguing question: is the level of privacy provided by these tools enough to protect our identities and activities in the digital world? Or should we be focusing on developing new solutions and improvements to further safeguard our privacy in the Bitcoin ecosystem?
There was this time in the past when I had some tradable altcoin in my wallet and those coins were trading on a decentralized exchange, so I had to swap the coins for USDT. After I did that, I deposited those USDTs on one centralized exchange that doesn't require KYC. I bought some bitcoin from that exchange and repaid it back to my wallet.
From what I have explained so far, I don't really think I can be tracked to my identity as the owner of those bitcoins I purchased because I did not pass KYC on that exchange. You have talked about mixers and coinjoin, and I don't think there should be any other tool needed to be developed for privacy.