I have few questions and i will try to write all of them here without spamming too much.
1) Why company as Google or Amazon dont create their own coin ?
2) Wich alternative coin would u mine atm.
3) On wich existing coin would u invest beside BTC and why
1) Some company probably will. Megaupload have their own one. I think it'll only be a matter of time before some big corporation or bank makes their own.
2) I don't mine, so can't say.
3) Feathercoin. It's got a great community and forward-thinking development/publicity team behind it and is currently really cheap at 0.30 cents. It's also one of the only coins to have it's own free-to-use ebay style marketplace, which I think is a real plus and easy way to get some coins:
https://market.feathercoin.com/index.php