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Firefish lets you borrow fiat against your Bitcoin without giving up custody — so you can scale your operation without selling a single sat.
Non-custodial, multisig-secured
Instant or peer-matched loans
EUR, CHF, USDC, CZK
Fund gear, opex, or power bills — without losing your stack
This partnership speaks one language: Bitcoin.
Braiins brings the firmware, pool, and mining tools
Firefish brings the liquidity — Bitcoin-backed, no rehypothecation
Miners stay sovereign, operations stay running
Together, we help miners mine more Bitcoin and hold more Bitcoin.
Use promo code BRAIINS30 or the link below for 30% off your first loan’s origination fee.
