Cross-market trader 58bro.eth, known on X as 0x58bro, has taken a new September range view on Bitcoin through Polymarket while continuing to expand a BTC short on Hyperliquid, according to TradingBeats monitoring cited by BlockBeats on Sept. 20.
Polymarket positions point to a September trading band
The trader bought contracts tied to Bitcoin not falling below $70,000 and not rising above $95,000, a combination that effectively expresses a view that BTC will stay inside that range for the rest of September.
Between Sept. 19 and Sept. 20, 58bro.eth bought about 10,000 shares of "BTC to $70,000 in September" No for roughly $9,604. The trader also bought about 8,578 shares of "BTC to $95,000 in September" No for about $8,180, and spent about $49,300 to buy 50,000 shares of "BTC to $100,000 in September" No.
At press time, the market-implied probabilities for those three "No" outcomes were about 95.3%, 95.7%, and 98.85%, respectively.
A higher and narrower range than in August
This is not the first time 58bro.eth has traded a monthly BTC range. In July, the trader bet that Bitcoin would neither fall to $47,500 nor rise to $75,000. In August, the range was widened to $60,000 to $100,000.
For the current round, the lower bound has been raised to $70,000 and the upper bound tightened to $95,000. Compared with August, that amounts to a higher and narrower expected range.
Past prediction-market results and Hyperliquid exposure
Across 19 monthly BTC and ETH price predictions made in July and August, all of them ended in profit, with cumulative realized gains of about $12,700. All of those positions were No contracts, and in most cases the implied probability at entry was already above 95%. The report said the approach leaned toward collecting the remaining odds from high-probability range calls rather than betting on a large one-way move.
Its Hyperliquid positioning, however, is not fully neutral. Over the past three days, 58bro.eth increased the BTC short from 88.75 BTC to 105.25 BTC. Combined BTC and ETH shorts were worth about $26.137 million, with a combined floating loss of about $1.132 million.
Data cited in the report showed cumulative profit on Hyperliquid has reached $33.7 million. The trader's historical win rate stands at 90%, and the average holding period is about 23 days, a duration the report linked to the cadence of monthly prediction-market trades.