Bitcoin has a big problem : the block chain size. Right now it is still quite unknown and still the block chain size is approaching 10GB, which means you can't

Bitcoin has a big problem : the block chain size. Right now it is still quite unknown and still the block chain size is approaching 10GB, which means you can't use it on devices like mobile phones (without a centralized service, which somehow defeats the purpose of Bitcoins, which was supposed to be a decentralized currency). There are techniques to prune unneeded transactions, but they seem inefficient. If Bitcoins were to become popular, for example replace dollars, you could easily expect the block chain to jump to the order of TBs. About the documentary itself, I honestly don't see its point. But it's not the only Kickstarter project that seems like an attempt to make some money.