point: do you at some become the victim of your own success, the king of the salvador monti's -- salvador monti's sale? guillaume: i do not think we will be victim of our success. the sale of the leonardo da vinci was also a result of what we have done it christie's over the last year. we have invested a lot in digital in asia to conquer new collectors and buyers, and i'm sure in the coming months and years there will be successes. we are not victim. we are building our own success. caroline: talk to us about how blockchain may be affecting your business. talk to us about digital chart -- art as an asset itself. digitale: 10 years ago, was not seen as a major asset on the art market. it was even seen as a threat on the art market. the thing that could maybe disrupt the art market. it is another channel. online sales, for instance, contribute in a major way in acquisition of new buyers. the social media, instagram, facebook, are the main channels we use for our marketing. can you imagine last year for the da vinci sale, half a million people followed live the sale, which is extraordinary?