Found 3 биржи where Contentos is traded for BTC. According to the data on 20 September the most optimal price to exchange COS for BTC is ₿0 for 1 Contentos. This rate is fixed at Elastic Finance Token at the maximum trading volume of the pair COS/BTC - 0 BTC.
The maximum daily trading volume is observed in the COS/TRY trading pair at and reaches ₿ 48.82 (186,072.39% of the exchange's total trading volumes) at the price ₿ 0 per 1 COS.