You do not have to know anyone who uses it. It is frictionless intrrnet-native money that can be permissionlessly exchanged peer-to-peer for goods and services. You can use it to pay anyone anywhere in the world with instant settlement. Check out btcmap.org for merchants that accept bitcoin. You can buy directly from ranchers all over the US too by looking them up on map.beefinitiative.com

If you want a great and easy read on the moral case for bitcoin, you should check out Thank God for Bitcoin by Jimmy Song (and a number of other authors).