Bitcoin had spent months falling, and last week it went the other way hard. It rose 23% in the seven days to Sunday, its biggest weekly gain in about three years, and pushed above $80,000 for the first time since mid-May.
The trigger sat in the US bond market. Treasury Secretary Scott Bessent announced last week that the government would step up its repurchases of long-dated bonds, which pushes long-term borrowing costs down by making the state a buyer of its own debt. Sceptics read it as the administration reaching for the easy lever rather than doing the work of shrinking the deficit.
Why a bond announcement moves a crypto price
Bitcoin was built as an escape from debasement, the erosion that comes when central banks create money. A government stepping in to hold its own borrowing costs down reads, to that crowd, as a reason to hold less currency and more of something nobody can print. The dollar sold off on the news, and gold, the older version of the same trade, went up alongside it.
The bets that had to be bought back
Part of the rise bought itself. A trader betting on a fall gets closed out when the price runs against them, and closing that bet means buying. Roughly $7.2 billion of leveraged bearish positions across crypto were liquidated last week.
Real money came in behind it. The thirteen US-listed spot bitcoin funds took a net $1.92 billion over the week, their strongest run in ten months, and a further $337 million on Monday. Those funds buy actual coins, and fewer are available than the headline supply suggests, because about 60% of the bitcoin in circulation has not moved in more than a year.
Why $81,000 matters more than $80,000
Traders are watching a level slightly above where the price got to. Bitcoin's 50-week moving average sits at roughly $81,000, a line it has traded below since November, and it touched $81,257 on Tuesday before easing back. Closing above that average is the thing technical traders treat as evidence a rally has legs.
Miners sit on the other side of the same line. The average cost of mining one bitcoin was just under $80,000 at the end of last year, on CoinShares' numbers, which puts the current price roughly level with the cost of producing a new coin.
Politics is moving too. The Clarity Act, the US market-structure bill for crypto, failed to reach a Senate vote before the August recess and is expected to be taken up again in mid-September, after Donald Trump met industry leaders and pushed for it.
Bitcoin is still a long way from where this started. Its October peak of about $126,000 sits more than a third above where the price is now.
