Four Bitcoin Holders, One Problem: How Different People Actually Use a 0%-Interest Vault

A founder making payroll. A retiree who needs income. A ten-year holder facing a tax bill. A DeFi native who refuses to touch a custodian again. Four very different lives, one shared refusal — none of them want to sell their Bitcoin. Here is how each of them solves it the same way.

There's a question that sounds simple and turns out to be the whole story of Bitcoin ownership: what do you do when you need money and everything you have is in Bitcoin you don't want to sell?

For most of Bitcoin's history the answer was grim. You sold — triggering a tax event and giving up the upside you'd waited years for — or you handed your coins to a lending company and hoped it stayed solvent. In 2026 there's a third answer, and the most useful way to understand it isn't through mechanics. It's through people. So here are four of them.

Marcus, the ten-year holder

Marcus bought his first Bitcoin in 2015 and never stopped stacking. On paper he's wealthy. In practice he's cash-poor, because every dollar he'd get by selling comes with two costs he refuses to pay: a capital-gains bill on a decade of appreciation, and the permanent loss of coins he believes will be worth far more later.

This spring his daughter got into a university with a tuition bill that doesn't care about his convictions. The old Marcus would have sold — grudgingly, at whatever the market handed him, in a year when Bitcoin is well off its highs and selling feels especially bitter. The 2026 Marcus does something else.

He deposits Bitcoin into a vault — an isolated smart-contract position — and against it mints BPD, a US-dollar-pegged stablecoin, at 0% interest. He pays a small one-time borrowing fee and no recurring rate at all. The dollars cover tuition. His Bitcoin never leaves the contract for anyone's balance sheet, and because he never sold, he never triggered the tax event. When he's ready, he repays the BPD and takes his collateral back — every coin, still his.

Marcus's problem was the patient holder's problem: liquidity without surrender. He didn't have to choose between his daughter's tuition and his ten-year thesis. That's the whole point.

Priya, the founder with a Bitcoin treasury

Priya runs a fifteen-person software company that holds part of its treasury in Bitcoin. Payroll is due every two weeks whether or not it's a convenient moment to liquidate.

Selling treasury Bitcoin to make payroll is the kind of decision that quietly wrecks a balance sheet. You sell into weakness, you book the gain or loss, and you shrink the very reserve you were trying to build. Priya's alternative is to treat the Bitcoin as what it is — collateral — instead of something she has to spend.

She opens a vault, mints BPD against the company's Bitcoin, and covers the payroll cycle with borrowed dollars rather than sold assets. The treasury stays intact and stays exposed to any recovery. When receivables land, she repays and closes out. She's used her Bitcoin as working capital without spending it, which is exactly what a treasury is supposed to let you do and almost never has.

The founder's version of the problem is cash-flow timing: real obligations on a fixed schedule, sitting on top of an asset she doesn't want to sell at the wrong moment. A 0%-interest vault turns a forced sale into a temporary loan against herself.

Tom, the retiree

Tom is 63 and a chunk of his retirement is in Bitcoin. He needs it to do something — to throw off spending money — without him having to sell a slice every month and watch the stack shrink through a soft market.

For Tom the appeal isn't just the borrowing. It's that the whole system runs on rules he can read rather than a firm he has to trust. He's old enough to have watched more than one financial institution promise safety and deliver a bankruptcy filing. The idea that his collateral sits in code — not in a company that can rehypothecate it, freeze it, or go under — is worth as much to him as the interest rate.

Tom borrows conservatively. He keeps his vault's collateral ratio comfortably high, well above the protocol's 110% minimum, so ordinary volatility never puts him near the liquidation line. He draws BPD for living expenses and lets his Bitcoin position ride. If he wanted to be paid for helping the system stay solvent, he could even deposit BPD into the stability pool and earn from it — the earning side of the same protocol. But mostly Tom just wants durable, boring access to his own wealth, and he's found it.

The retiree's problem is income without erosion. Tom gets to spend from his Bitcoin without spending it.

Dani, the DeFi native who's done with custodians

Dani doesn't need anyone to explain smart-contract risk. She's technical, she's been in crypto since before it was respectable, and she has a hard rule after 2022: no custodial lenders, ever again. She watched friends lose real money to companies that swore their deposits were safe.

For Dani, a self-custodial borrowing protocol isn't a convenience — it's the only acceptable option. What she cares about is verifiability: that the 110% minimum collateral ratio and the 150% system-wide recovery threshold are hard-coded parameters applied identically to everyone, not policies a management team can quietly change. That there's no CEO who can decide to lend out her collateral. That the secondary token, MP, routes protocol fees to the participants who keep the system healthy rather than to a discretionary treasury.

She reads the contracts. She checks the audits. She sizes her position like an adult and monitors her vault's health herself, because she knows no support desk will un-liquidate a position she let drift. And that's precisely what she wants — a system where the autonomy is the product and the homework is hers to do.

Dani's problem is trust, and her solution is not needing any. "Don't trust, verify" was always Bitcoin's promise; she finally gets to apply it to finance.

The shape they share

Four people, four unrelated lives — a stacker, a founder, a retiree, and a skeptic. What they have in common is a single sentence: I need to use my Bitcoin without giving it up.

The old world made that a contradiction. You either sold, or you surrendered custody, and both meant giving something up. The mechanism underneath all four stories dissolves the contradiction the same way every time:

• Deposit Bitcoin (as RBTC, Bitcoin on the Rootstock network) into a vault.
• Mint BPD, a dollar-pegged stablecoin, at 0% interest — one small borrowing fee, no compounding rate.
• Keep full custody the entire time; no company holds your collateral, because there's no company in the middle.
• Repay whenever you want and reclaim every coin.

The protective parameters — the 110% minimum ratio, the 150% recovery mode, the stability pool that absorbs liquidations — are the same for Marcus and Priya and Tom and Dani, because they're written into the contract, not negotiated per customer.

The honest note

None of these four are pretending the tool is magic. Borrowing against a volatile asset means watching your collateral ratio, especially in a choppy market. Smart-contract risk is real — code holding your collateral is a different risk than a company, not zero risk. Self-custody means the responsibility is genuinely yours. Each of these people learned the mechanics before committing capital, and that's the correct order of operations.

But the reason their stories rhyme is that the underlying need is nearly universal among people who hold Bitcoin seriously. Sooner or later, life asks for liquidity. The question is whether you have to sell your conviction to answer it.

You don't have to. Read the full mechanics at docs.moneyprotocol.co, or see the tool these four all used and borrow against Bitcoin at 0% interest while keeping custody the whole way through.