Bitcoin does not make banks unnecessary.
Bitcoin cannot provide loans.
Bitcoin cannot provide investments.
Bitcoin cannot provide estate security.
Bitcoin has it's place as an option to the intelligent investor. But it will never replace a bank.
This is totally wrong. Everyone can provide a loan with bitcoin and there are already alot of sites that lend people through bitcoin like btcjam.com. Bitcoin will never replace it but it doesnt mean that bitcoin cant stay side by side with it.