Found 1 биржа where Coalculus is traded for BTC. According to the data on 29 September the most optimal price to exchange COAL for BTC is ₿0 for 1 Coalculus. This rate is fixed at zkSync Bridged WBTC (zkSync) at the maximum trading volume of the pair COAL/BTC - 0 BTC.
The maximum daily trading volume is observed in the COAL/IDR trading pair at 🔥 WEB3 Jobs and reaches ₿ 0.05 (1,366.42% of the exchange's total trading volumes) at the price ₿ 0 per 1 COAL.