Rehypothecation Is Cryptographically Impossible

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Издатель Jun 11, 2026

"Rehypothecation is cryptographically impossible."

Martin Matejka joins the show to break down the rise of Bitcoin-native lending, Firefish's 3-of-3 multisig + DLC architecture, and why the February 6 stress test was the day Bitcoin-backed credit grew up.

We discuss why rehypothecation can be engineered out rather than promised away, how Firefish thinks about LTV, margin-call cadence, and the three warnings before liquidation, and why $160 million in non-custodial loans across 27,000 users in 70 countries is the proof a Bitcoin-native lender can scale.

⏱️ CHAPTERS
0:00 Cold open
1:56 Welcome to The Bitcoin Matrix
2:05 Intro — Martin Matejka, Firefish CEO
2:54 The origin — investing without selling Bitcoin
5:33 Power trading at ČEZ — what risk taught him
7:04 Martin's rabbit hole — Austrian economics meets cryptography
9:14 Sponsor break
10:35 What is a Bitcoin-backed loan
11:43 Shorting fiat, going long Bitcoin
13:17 Why interest rates are coming down
14:24 What happens when Bitcoin's price drops — 50% LTV
17:03 "Rehypothecation is cryptographically impossible"
18:01 3-of-3 multisig + the self-recovery transaction
20:30 February 2026 — the stress test the architecture passed
22:01 LSEG Workspace — Bitcoin credit has a ticker
22:59 Sponsor break
24:15 Why Prague? Trezor, Braiins, and BTC Prague
25:54 Who lends on Firefish — including Martin's parents
28:14 How stablecoins fit in
29:02 Is lending Bitcoin's next phase?
30:21 Are you enjoying it?
31:11 For the listener sitting on a stack
32:34 Where to find Martin + Firefish
34:22 Outro

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