Do people not realise that the whole point of cryptocurrencies is that they are de-centralised.
That means they can't be owned. It means that if Bill Gates himself launched an alt coin it would be about as competitive as Auroracoin on fundamentals. Obviously Gates-Coin would generate some interest on hype, but would have no long term advantage.
Look at Maxcoin. You could not have got a more hyped coin, and yet it sunk only a week after launch.
Billionaire launching coin = who cares.
Egocoin.
Not if you can buy their products and potentially many other products with the new currency. Imagine infrastructure set up to be able to buy all virgin or microsoft goods immediately with a new coin.