Monero is the ONLY private currency.
Not in and by itself without the proper platform. FOSS all the way and strip anything and everything off two FOSH boxes/slabs; like Librem, Some Thinkpads (Go old; like Core2Duo X200 to avoid chipspection hardware; Like RMS does), custom iykwyd building C2D, crack an i5/i7/+ cracking ME off, or near two decade old AMD chip before PSP spy-subchip chipsets.
Ditch wifi all wifi components without having at least 3 FOSS systems. One connectable to manage your Monero. Second to handle broadcasting without the actual monero keys put into it.
On the third handle all wired movements from an active to a connection it handles and spies on yourself for every bit of data in and out censoring anything and everything that isn't explicitly approved permission via wireshark or better FOSS.
That's the only way to know your Darknet activity is not being observed close enough to know you before you know you are being attempted to be spied upon.
GPG, encryption, VPN (Mullvad accepts Monero directly), & NO systemd (Slackware)
i2p/TOR/etc. can find you any kind of dope you want and shit you didn't know was real yet. Test&Est on many markets, easy. Check the forums there before you trust a market and be very tight on the level of trust you never have to give a market.
I know someone that got the cops knockin' on their door, carrying the package in question, looking for a shitty vendor. Twice. No problem but probably because they weren't a vendor too. And they thought they were a clever jackass but no stamped history of convictions; though several equally strange scenarios dodged and not by snitching either. Ostensibly, sure. I knew enough to say so with surety but not trying to deal with them either way so I can't say it from that kind of surety experience, personally, though.
Still, enough to say, the inability to know anything because of FOSS over a meaningful target when they couldn't lay shit on even them, regarding packages they hadn't opened.
You get good enough at this and find yourself highly suspicious of your environments suspicion on yourself, find a friend to receive packages. There's more but, meh. That's more than even I bothered to learn for...other reasons.
Gl and if you get that far or near it, I could tip you on more but you're probably better to just ignore me and go tech-research. To understand true FOSS sake because that is the Golden Aeon of living any minute in the future without this planet becoming Arrakis very fucking soon. Frank well detailed how the original book on buying bells was missing a zero to that prediction/plan/revealed.