The source of the statement is from this article http://www.newsbtc.com/2016/11/20/circle-ceo-nobody-will-using-bitcoin-5-10-years/

So I ask this. As the growth of the darknet market place every year keeps going higher and higher, the possibility of it becoming a multi billion market place is not too far to reach. What currency will it use if not Bitcoin?

Does the CEO of Circle knows what he is talking about at all? Most of the so called "experts" in the Bitcoin and blockchain world do not know what they are talking about because it is all still new.

For me the people to listen to about blockchains are Peter Todd, Gregory Maxwell, Adam Back, Luke-Jr and there might be some names I have forgotten so please post them in here.