Found 4 exchanges where PancakeSwap is traded for BTC. According to the data on 26 August the most optimal price to exchange CAKE for BTC is ₿0.000022 for 1 PancakeSwap. This rate is fixed at Azbit at the maximum trading volume of the pair CAKE/BTC - 2.4 BTC.
The maximum daily trading volume is observed in the CAKE/USDT trading pair at BitDelta and reaches ₿ 191.25 (0.688% of the exchange's total trading volumes) at the price ₿ 0.000022 per 1 CAKE.
The minimum price to buy CAKE for BTC is 0.000022 - on the exchange Azbit.
The maximum price to buy CAKE/BTC is 0.000021 - on the exchange CoinEx.
Warning: some CAKE markets show an abnormally wide spread — those quotes may be unreliable (thin liquidity or off-market trades). Cross-check the volume against several venues.