Big news! It seems that he has identified the bottom and is confident that a recovery is under way. Berkshire now has a bitcoin department which is why the price pumped this past week. Go get some!
The price of bitcoin does not revolve around one individual investment and there was a time when the market moved according to any news that is coming out, but that is not the case now and even if the news of an old man investing in bitcoin is a true 
, it does not make any difference in price simply because of that, the market is showing signs of recovery and hopefully we will see the market breaking the first resistance in a weeks time.It does not but it may initiate a spike or a bull run, and even a mass adoption. Known figures especially in finance industry have great influence over people. Their thought are valued by their follower or those people who believe in them. That is why it would be big if Warren Buffet make a U turn and invest in Cryptocurrency. He will greatly influence lots of investors.