Google's monopolistic stranglehold on Android results in poor experience for power-users, and artificially restricts choice for those who have older phones. For example, Google Wallet is the de facto way to use NFC payments on Android. There's one problem though - it only works with Google's Android. If you have the temerity to install a 3rd party Android OS - like the hyper-secure GrapheneOS - …
Needs Play Services, not interested. I’ll stick with cash for now, it’s less traceable anyway (if you use coins, bank notes are numbered and thus traceable)
Monero.
No other “coins” are actually private. Everything else that claims private is literally a snitch. Zcash, etc. Bitcoin was made purely public with all data logged, tracked and verified on every block.