The ending of the article is weirdly anti-cash
A more "trustless" approach could involve the collection box being replaced by a link or QR code or a bunch of detachable paper slips with said link. Link leads to online donation portal. Of course, someone could try to tamper with those links.
It's also common to have qr-code or cash only payment available in mountain restaurants.
(or even in other venues, was surprised to have a large festival in Zurich which was mostly qr-code or cash).
More than much money in cryptocurrency is stolen every day.