Coinjoin was used in a pre-LN era and was good for those times. Now is kind of obsolete and like a honeypot trap and a tool for "cash-grabbers" fooling noobs. If you still don't know how to "lose trace" using LN, it means you still have a lot to learn about LN.
Lightning and coinjoin are two different ways to achieve privacy, with different trade-offs. They complement each other. Which is why I use both. In particular, I often protect coins with Wasabi, and then use those protected coins to open Lightning channels to get the funds back into Lightning.
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I used Wasabi and Whirlpool in the past, in the pre-LN era. I don't use them anymore. Not useful for me. LN is enough for what I do with BTC.
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Don't put all your security eggs in one basket...
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watch me, using the 3 levels stash https://m.stacker.news/39041
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