It is a curious case of the nuns, but in reality, that they have been able to build the church has been done by donations, which in this case have been in Bitcoin, but could have been in fiat currency.
They not only build the church by donation of Bitcoin, they also follow St. Benedict’s rule to buy Bitcoin, which means they don't only receive the Bitcoin by donation.
It is not that the nuns have done any work or any investment to get Bitcoin. They simply received the funds in Bitcoin and used them to build the church.
It says the nuns were growing their own produce and raising their own cattle and chickens.
The nuns were able to sell proceeds for the purpose of building their church, which means they not only built the church by Bitcoin donation, they may have bought some Bitcoin too.
I am glad indeed the sisters' embrace of technology paid off well, without disregarding other support they got too, apart from the Bitcoin donation.