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but you can't reup the anonymity of an existing utxo. to coinjoin you have to make a new utxo. you have to spend a uxto to increase it's anonymity set.
I think it was a half-formed thought, and it isn't any clearer in my mind now. But I think a lot of bitcoiners want to feel like they can park their utxos somewhere and the anon-set of those coins doesn't degrade over time.
But isn't the reality that for any utxo, the anon-set does gradually degrade (eg other outputs of coinjoins you were in get doxxed, a database leaks that has some identifying info about one of your other utxos and now timing correlations can be performed on your utxos or wallet fingerprinting, etc)?
Ah! Yes that is correct. The anon set, by elimination of the other utxos in the whole, are always losing anonymity, so you can mix it and reup, and if you're lucky and you weren't in a round full of the fed's coins and other coercible people they can just make meet a metal ejection device, you can have a reupped new utxo. Since utxo can only be manipulated by spend, you can only influence them by spending, which on its own is once more something to be careful about because there are sidechannels. Like timing.
This also goes for joined coins that sit idle for a while.
all terrifying prospects. I'm just gonna deposit my coins with a federation (...oops!) or a safe hardware wallet (double oops!) or a layer-2 protocol (ah, fuck), or maybe just Mr. Saylor; he seems trustworthy and smart
Sell it to Saylor for STRC and then buy clean bitcoin with those dividends.
If those are the options available to you then yeah all your options suck. I've been doing non-custodial Bitcoin since 2013 and self-custodial since whenever people got anal about the word non-custodial. I made fuckups so you don't have to. What do you wanna know and no I am not commenting on how many.
he-he, you said "anal"!
If those are the options available to you then yeah all your options suck.
only the funniest options that came to mind
hmm no you can reup your anonymity. There's a new territory about that. But if you have to trust a coordinator for it you must assess what data exactly you are leaking. That's what no one did on Samurai, just like it is what no one did on Coldcard.
<same picture meme>