Bitcoin Holds $79k as Yen Rally Tests Market Resilience

In August, Japan deployed roughly $100 billion to bolster the yen. Yet even after that effort, the currency couldn't climb to 154 per dollar.

Traders then achieved that level on their own. The dollar-yen pair dropped from 160.39 on Wednesday to 154.50 by Monday, a 3.7% yen gain over three sessions with no further official intervention from Tokyo.

The relevance for crypto stems from a parallel event in August 2024, when a yen rally compelled investors to liquidate low-cost yen-financed positions and sell risky holdings such as Bitcoin.

Bitcoin Just Passed the Yen Test

The main risk was always how fast the yen moved. On September 1, with the yen around 159.75 per dollar, BeInCrypto highlighted that danger.

A comparable exit from yen-backed trades in August 2024 had forced a sell-off in risk assets, with Bitcoin and Ethereum dropping as much as 20%.

On this occasion, Bitcoin stayed above $79,000. Monday's price action thus served as a stress test for a strategy that inflicted heavy losses on crypto in 2024. The test also coincides with Japan disclosing the cost of its initial intervention and the reasons a second rescue could be more difficult.

Bitcoin now holds above $79,000, near its best level since May. This marks a clear divergence from the 2024 pattern.

Japan May Have Less Firepower Left

The Finance Ministry has also disclosed the source of the funds for the initial intervention.

Japan's foreign reserves declined by $94.6 billion in August, reaching $995 billion. The drop in foreign securities alone was $87.8 billion, indicating that Tokyo offloaded short-term US Treasuries to finance the yen's defense.

JUST IN 🚨: Japan likely dumped U.S. Treasuries to fund Yen Intervention 🤯 👀 Uh Oh

— Barchart (@Barchart) September 7, 2026

This situation generates a political dilemma.

“Japan still has room to intervene given the amount of securities it holds, but given comments from Bessent, selling US Treasuries to fund further intervention could end up attracting pressure from the US,” Japan Research Institute economist Akira Nishimura said.

As a result, the Bank of Japan shoulders a larger share of the effort.

According to HSBC, markets currently anticipate about 75 basis points of total rate increases by April 2027. A quarter-point rise next week would bring rates to 1.25%, continuing the monetary tightening course that BeInCrypto noted following July's inflation figures.

BOJ board member Hajime Takata has already advocated for swifter steps, calling on policymakers to act “nimbly” in response to increasing inflation.

Japan PM Takaichi’s reflationist aide projects Bank of Japan rate hike in September – ST

The Bank of Japan is likely to raise interest rates in September and keep hiking at a pace of once every quarter until January 2027, Takuji Aida, an economic adviser to Prime Minister Sanae…

— MacroGuru (@macroguru9) September 7, 2026

What remains to be seen is the pace of the yen's further ascent. Bitcoin has withstood the initial shock. A sharper yen move would constitute the true trial.