The tech companies you've mentioned are not like Berkshire's model at all. Berkshire is a conglomerate that looks for proven, established, cash-flow-positive b

The tech companies you've mentioned are not like Berkshire's model at all. Berkshire is a conglomerate that looks for proven, established, cash-flow-positive businesses. See's Candy, for instance, requires no debt and is a sure bet every holiday season. On the other hand, self-driving cars and WiFi balloons are extremely speculative and definitely aren't cash generating.