Before publishing is required that advertisers must give a plausible proof of their activity: tagged and timestamped photographs of their products, tagged and timestamped screen photos, customer's feedback with photographs, etc.

Before publishing is required that advertisers must give a plausible proof of their activity: tagged and timestamped photographs of their products, tagged and timestamped screen photos, customer's feedback with photographs, etc.

Before publishing is required that advertisers must give a plausible proof of their activity: tagged and timestamped photographs of their products, tagged and timestamped screen photos, customer's feedback with photographs, etc.

Before publishing is required that advertisers must give a plausible proof of their activity: tagged and timestamped photographs of their products, tagged and timestamped screen photos, customer's feedback with photographs, etc.

Before publishing is required that advertisers must give a plausible proof of their activity: tagged and timestamped photographs of their products, tagged and timestamped screen photos, customer's feedback with photographs, etc.

Before publishing is required that advertisers must give a plausible proof of their activity: tagged and timestamped photographs of their products, tagged and timestamped screen photos, customer's feedback with photographs, etc.

Before publishing is required that advertisers must give a plausible proof of their activity: tagged and timestamped photographs of their products, tagged and timestamped screen photos, customer's feedback with photographs, etc.

Before publishing is required that advertisers must give a plausible proof of their activity: tagged and timestamped photographs of their products, tagged and timestamped screen photos, customer's feedback with photographs, etc.

Before publishing is required that advertisers must give a plausible proof of their activity: tagged and timestamped photographs of their products, tagged and timestamped screen photos, customer's feedback with photographs, etc.

In 2017 the Bitcoin price exploded. If in the January 2016, the Bitcoin had a value of 400 usd, in December 2017 the price skyrocketed reaching a level of 20,000 usd. In 2018 Bitcoin price continued to decrease reaching its lowest level at the end of the year.