Looking for a Firefish referral code? Here it is: bitcoinvkapse. Enter it during registration and get a 30% discount on the fee for your first bitcoin-backed loan.
Below I’ll explain where to enter the code, how the bonus works and what to expect from Firefish.
Firefish is a platform for bitcoin-backed loans. Instead of selling your bitcoin, you lock it as collateral and receive fiat — Czech crowns, euros. Your bitcoin stays yours, you just can’t move it temporarily. Once you repay the loan, you get your bitcoin back. No sale, no taxable event. If you want to know more about how Firefish works, I also have a separate review.
Firefish referral code: bitcoinvkapse
The code is straightforward: during registration on Firefish, enter “bitcoinvkapse” in the referral field and the fee on your first loan is 30% cheaper. No additional conditions, no minimum loan amount.
Where to enter the referral code
Steps:
- Go to Firefish
- Click on registration
- Fill in your basic details
- Enter bitcoinvkapse in the “Referral code” field
- Complete registration
If you click through to registration from this guide, the code will be filled in automatically.

What you get: 30% discount on the fee
Firefish charges a fee of 1.5% of the borrowed amount for facilitating the loan. With the code bitcoinvkapse you pay 30% less on your first loan, i.e. around 1%. On a larger amount that’s not negligible — on a loan of 100,000 CZK you save roughly 500 CZK.
After the first loan you pay the standard rate like any other user.
Who Firefish makes sense for
- You hold bitcoin long-term and don’t want to sell
- You need fiat liquidity — for an investment, a bigger expense or anything else
- You understand how collateral and liquidation work and can do the math
If you’re a bitcoin beginner or don’t know what a liquidation price is, study the basics first. A loan secured by bitcoin collateral is a powerful tool, but it requires discipline and an understanding of the mechanics. Also read my tips and tricks for safe usage.
My experience with Firefish
I’ve tested Firefish myself and wrote a detailed review covering how to set up collateral, what to watch out for and when a loan makes sense and when it doesn’t. If you’re seriously considering a loan, I recommend reading it first.
Summary
- Firefish referral code: bitcoinvkapse
- Bonus: 30% discount on the fee for the first loan
- Where to enter it: during registration at firefish.io


