In a recent article on Bitcoin (BTC) price manipulation, it was said that there was only one person who increased the Bitcoin price from $150 to $1000 in 2013.
Neil Gandal, This article, co-authored by JT Hamrick, Tyler Moore, and Tali Oberman, examines questionable trading activity on Mt.Gox. Gox claims that the cryptocurrency exchange is linked to the sharp rise in the USD-BTC exchange rate in late 2013: It has increased by four percent.”
Doubtful activity is mostly due to two bots, Markus and Willy