Big investors wont just invest a big amount in something without any certain possibility. Theres a difference between risk taking and throwing money to some uncertain sector. I bet people like him are calculated risk takers. So, obviously its a good sign for general users. Another sign that tells BTC has brighter future.
While this is a good sign, it doesn't guarantee that the price of Bitcoin will significantly increase. We could see another pump and dump by big investors so they can sell to suckers at the top...