Turns out it's fiat. Should be banned.

Is cryptocurrency helping Hamas fund terrorism?

Hamas has an estimated annual budget of nearly $1 billion.

Israel seized virtual wallets linked to Hamas that had received $41 million (€39 million) between 2019 - 2023.

-France24

https://www.france24.com/en/middle-east/20231022-is-cryptocurrency-helping-hamas-fund-terrorism