Willy Woo says Bitcoin's hard cap makes borrowing more dangerous, not less. In a thread this week, the on-chain analyst argued that a currency which keeps appreciating forces borrowers to repay in money that grows more expensive over time — raising default risk and pushing lenders to pull back. Saifedean Ammous, author of The Bitcoin Standard, reposted his own 2019 challenge to economists on X, saying he is still waiting for anyone to explain clearly why hard-capped money would fail.
The repayment problem
Woo's argument is simple enough. If the money you owe is worth more by the time you pay it back, every loan gets heavier. Defaults rise. Lenders get cautious. Credit tightens. The mechanism runs in the opposite direction from what most people assume about sound money — that it would simply make everyone more disciplined and everything more stable.
He points to the current wave of global borrowing for AI infrastructure as the live example. Debt-fueled spending on data centers is exactly the kind of growth that needs cheap, expandable credit. Some investors already warn the AI data center boom could end in a crash. Woo's point is that under a Bitcoin standard, that borrowing would be harder to sustain in the first place.
Gold did the same thing
Woo draws a parallel to the gold standard. Back then, the ratio of paper money to actual gold backing kept rising — not because anyone wanted to debase the currency, but because lending risk had to be eased somehow. Credit kept flowing on top of a scarce reserve asset. The reserve stayed hard. The claims on it didn't.
He says a Bitcoin standard built on satoshis would likely deliver much slower growth and far fewer bubbles. Both of those are the trade. You don't get one without the other.
Where growth actually comes from
Woo also pushes back on the idea that savings build capital from the bottom up. Growth, he argues, depends on technology, energy, and raw materials — and those need mega-scale infrastructure and large pools of capital. Sitting on savings doesn't produce a semiconductor fab or a power grid. Someone has to borrow big and build.
He has made a related case before: that Bitcoin may follow a six-to-eight-year debt cycle. That framing puts the asset inside the credit system rather than outside it, which is roughly where the argument gets uncomfortable for maximalists.
The old divide, again
The exchange revives a split that never really went away. Bitcoin advocates point to the dollar's lost purchasing power as the case for hard money. Critics look at the same fixed supply and see a brake on credit. Ammous asked for a clear rebuttal in 2019. He says he hasn't gotten one yet.
What would settle it isn't a thread. It's a lending market priced in bitcoin, with real default data, over a full cycle. No such market exists at scale right now. Until it does, the argument stays theoretical — and both sides keep talking past each other.
