Besides tumblers and mixers, and the good ol' back-and-forth with XMR, what do you think could effectively anonymize your crypto? Both these methods are expensive as hell, specially now that Bitcoin Core accidentally the whole thing and tx fees are through the roof, so doing this for small amounts is extremely cost-ineffective.
I'm thinking of buying DOGE (fast and ridiculously cheap tx fees), transferring to Shapeshift.io for Litecoin (also cheap tx fees), which goes directly to Changelly for Bitcoin Cash (cheap tx fees, and Dream is starting to accept it, other DNMs are likely to follow suit). All of this behind onions for that sweet IP obfuscation, of course. Theoretically, both these exchanges would have to collude with LE for them to track them back to my ID, which is very unlikely. What am I forgetting here?
just monero and then use xmr.to if the vendor wants btc, stop trying to overcomplicate things