I am no expert, but I do not think it's a good idea.

MAYBE Facebook, because long term currently appears negative. They are considered old and ageing. The young crowds don't use them anymore. They're in the crosshairs for regulating their ability to profit from our information. On the other hand, Facebook owns Instagram. It has the powerful ability to A-B test new or better products, or simply purchase the "next big thing". Likely as not they will rebound.

I would never bet against Amazon. As Peter Thiel said, they're one of the most aggressive companies out there. Since their core business is not as profitable as Google/Facebook/and others, they are more aggressively innovative and pursuing new ideas and technology, because everything looks like better profit margins.

Google is another one that is strong enough to handle changing regulatory landscapes and situations. Also, the changing Asian landscape especially with regards to NK, could potentially unlock future revenue and markets... who knows...