XMR or Cash

not sure, i use both and both are good enough tbh
but i guess if u wanna :tinfoil: it up or somethin..

cash since is in real world then the data trail is like, ATMs have their own cameras, you wanna buy a pack of cig at the store then the store has cameras and so on
literal fingerprints are a thing too (tho mixed between users but if new bill from the ATM or what then the pool is smaller), hair are a thing, pet hair are a thing lol

monero could also leave data trails, like trade histories stored by 3rd parties, retroactive quantum computer thing doing the blockchain analysis thing and so on

idk, as of today, both just work tbh
so wouldnt overthink too much on that, just keep in mind opsec when using either
and updates are a thing too, protocol improvements and so on
well, at least with cash in its current form there shouldnt be an update that would break the whole cash protocol thing lol, monero could still have a breaking update some day, computers can be very unreliable for literally no reason out of nowhere lol