I think it is expected that relatively new currencies have a turbulent period of a certain time.
And as for interest, here in the Netherlands it is less than inflation so you loose money (interest on savings accounts is about 1%, inflation is between 1 and 2% over the past years).
Bitcoin has or will have its niche, perhaps it will not be for your savings but sharing money with friends using a bitcoin wallet app is by far the most frictionless paying experience I ever had. I think you opinion is on the spot though... for now.