If you care about Privacy in your crypto Monero really is the current fore runner. BTC is only pseudonymous and given KYC of the exchanges everything in bitcoin land can be traced.
https://twitter.com/DelRayMan/status/824697015523246080
FBI love the open ledger.
Anyway given this is a tech site, here are some Monero based privacy techs you might be interested in
- RingSignatures https://en.wikipedia.org/wiki/Ring_signature
- Stealth Addresses https://getmonero.org/knowledge-base/moneropedia/stealthaddr...
- RingCT - https://getmonero.org/knowledge-base/moneropedia/ringCT
And some more information from their lab which is always interesting