I just shared a Twitter thread, so it's not me (earnbitcoin) that is doing this 100% in bitcoin story.
But one of the Tweet replies has info related to your question:
[...] I use the following:
[...]
Ah right, so he actually does have a bank account, just not in the traditional sense.
For example, fold will give you a debit card that is connected to a bitcoin wallet, so whenever you pay with the card, it sells bitcoin and pays with fiat. That is basically having a bank account.
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