Rarest September in Crypto History and Latest Bitcoin News as Tether Moves Billions in BTC

Against all expectations, September 2025 proved surprisingly kind to crypto. While BTC USD ticked higher in the first few weeks of the month, the sharp plunge in the final week failed to erase those gains. Instead, a mix of bullish Bitcoin news and resilient buyers provided strong support, establishing a solid foundation for BTC USDT to push above $125,000 in Q4 2025.

Presently, the Bitcoin price is steady above $116,000. The digital gold has successfully reversed its losses from September 25. That said, this leg up is on relatively low trading volume but has nonetheless pumped some of the best cryptos to buy. From a technical standpoint, a close above $118,000 could ignite an expansion toward all-time highs.

Bitcoin news: Tether buys Bitcoin. USDT issuer controls over 87,000 BTC. After closing September in green, will BTC USDT pump in Q4 2025?

(Source: BTC USDT, TradingView)

On Coinglass, trader sentiment leans optimistic overall. The long/short ratio for top trader positions stands at 1.5, though most top accounts remain heavily shorted, with a ratio of just 0.98. This bearish tilt is evident across platforms like OKX and in the majority of accounts. Meanwhile, inflows to spot exchanges are mixed, but notable purchases have emerged in the last eight hours.

Bitcoin news: Tether buys Bitcoin. USDT issuer controls over 87,000 BTC. After closing September in green, will BTC USDT pump in Q4 2025?

(Source: Coinglass)

Will BTC USDT Rally in Q4 2025 After a Rare Green September?

September’s gains could signal a bullish road ahead for crypto and Bitcoin traders. Historically, Bitcoin has rarely ended the month in positive territory. In much of this decade, it has closed in red, dragging top Solana meme coins with it.

What’s more? Out of roughly 15 Septembers since Bitcoin trading went mainstream, only four have closed green: in 2013, 2017, 2019, and 2023. Each was a rare event, typically fueled by unique catalysts, like the early adoption boom of 2017 or the ETF hype of 2024.

Bitcoin news: Tether buys Bitcoin. USDT issuer controls over 87,000 BTC. After closing September in green, will BTC USDT pump in Q4 2025?

(Source: Coinglass)

That’s why September is often dubbed “Rektember.” Yet, with Bitcoin posting a respectable +5% gain last month, this positive close might foreshadow even stronger performance to come.

Whenever September favors Bitcoin, though, the coin tends to roar through Q4. Historically, BTC USD has rallied more than +50% in the quarter following a green September. October alone often delivers at least +25% gains, with November and December piling on additional momentum.

Several key signals suggest this pattern could repeat. In the past, for instance, from 2020 through 2022, the lack of clear regulations and the SEC’s refusal to approve spot Bitcoin ETFs were major roadblocks. That shifted dramatically in 2024, when the agency greenlit the first batch of spot Bitcoin ETFs.

According to SoSoValue, U.S. institutions have snapped up over $150Bn in spot Bitcoin ETF shares. On September 30 alone, they purchased $429M, reigniting demand and bolstering the coin’s legitimacy.

Bitcoin news: Tether buys Bitcoin. USDT issuer controls over 87,000 BTC. After closing September in green, will BTC USDT pump in Q4 2025?

(Source: SosoValue)

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Bitcoin News: Tether Buys $1Bn in BTC During Q3 2025

Beyond institutions, major firms are also stacking sats.

In Q3 2025, Tether revealed it acquired 8,888 BTC at an average price of $112,500, for a total of $1Bn. The USDT issuer, tied to the viral Plasma blockchain, marked this as its latest treasury addition.

TETHER JUST BOUGHT $1 BILLION USD OF BITCOIN

TETHER IS BULLISH ON $BTC pic.twitter.com/JourxhhHXo

— Arkham (@arkham) September 30, 2025

This is Tether’s second major Bitcoin purchase; in Q1 2025, the USDT issuer bought another $1Bn worth. According to Arkham, the company now holds over 87,000 BTC.

Bitcoin news: Tether buys Bitcoin. USDT issuer controls over 87,000 BTC. After closing September in green, will BTC USDT pump in Q4 2025?

(Source: Arkham)

The accumulation strategy is deliberate. In 2023, Tether updated its policy to allocate up to +15% of quarterly profits to BTC, viewing it as an ideal inflation hedge. At the same time, the firm is diversifying its reserves, blending Bitcoin with assets like gold and real estate.

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