Found 1 exchange where zkPass is traded for BTC. According to the data on 3 September the most optimal price to exchange ZKP for BTC is ₿0.00000061 for 1 zkPass. This rate is fixed at Upbit at the maximum trading volume of the pair ZKP/BTC - 0 BTC.
The maximum daily trading volume is observed in the ZKP/KRW trading pair at Upbit and reaches ₿ 100.52 (1.26% of the exchange's total trading volumes) at the price ₿ 0.00000062 per 1 ZKP.
The minimum price to buy ZKP for BTC is 0.00000061 - on the exchange Upbit.
The maximum price to buy ZKP/BTC is 0.00000061 - on the exchange Upbit.
Warning: some ZKP markets show an abnormally wide spread — those quotes may be unreliable (thin liquidity or off-market trades). Cross-check the volume against several venues.