In 2030, USD won't be the measure of value anymore. But if there is a hyperinflation, then yes BTC can be worth $100,000 each or even more. It is very possible. But you should measure your BTC in 2016 purchasing value of the dollar, instead of the dollar.
Could never agree this. However high the inflation might be USD continues to be the measure of bitcoin even after several years from now. No other currency is strong as dollar right now.
Why not bitcoins, if you plan on holding your coins in order to become incredibly wealthy. Don't ever change to fiat, That is, convert the coins into fiat currency in order to make them more liquid. Wait until you're able to spend them on everything, from insurance, to property, to groceries and etc. This is when their value will be realized by the world.