Peoples reasons for believing Bitcoin will continue growing exponentially appear to be contrived afterthoughts. That doesn't necessarily mean they don't value privacy and freedom or think that Bitcoin has the potential to be useful but the main reason for the hype is people trying to make a buck.
No. Not really.
Care to explain why? Everything about Bitcoin and it's community are just about what you'd expect from a mania fueled speculative bubble. In your opinion why hasn't Wall Street and the business world at large gotten involved yet? Is it because they aren't comfortable with new technology?
A good bet would either be volatility (bad for business since 3rd party bitcoin exchangers like coinbase have to exchange BTC to USD or businesses could lose hundreds over night) or the shadiness of bitcoin and how the government(s) treat it.