One of the richest people in the world, the chairman of the board of directors and the chief executive officer of Berkshire Hathaway, Warren Buffett, has recently increasingly recognized the investment decisions made by him as erroneous. The latest mistake was the decision of Berkshire Hathaway to invest $337 million in the manufacturer of solar panels DC Solar Solutions during 2015-2018. After the bankruptcy of DC Solar Solutions, which was announced in February of this year, Berkshire Hathaway was forced to write off assets for a specified amount, reflecting this write-off in the reporting for the first quarter of 2019. The FBI and the US Tax Administration are continuing to investigate DC Solar, suspecting it of creating a fraudulent scheme in the amount of $810 million. Warren Buffett has previously announced his other mistakes, in particular with regard to investments in Kraft Heinz. He also expressed regret that he did not consider the viability of Amazon and Google and at the very beginning did not invest in them.