1. An alternative to a bank that allows you to use Bitcoin.  I use Strike, but Cash App and Fold are good too (I've used Cash App a bunch, but not too much Fold).  It's by no means impossible without it, because I used to do it without them, but it makes it so much easier to be able to have someone else autoconvert in and out of Bitcoin for you so you don't have to change much.
2. Lines of credit.  You never know when something's going to come up, so it's nice to be able to use credit to help pay for stuff as long as you can manage that in your day to day cash flows.

rollomcfloogle

What are the two or three most useful tools for a bitcoiner looking to get rid of their checking account?