it is correct i think. bitcoin is an alternative currency. and blockchain based cryptocurrencies are a solid alternatives for nowadays financial systems. decentralized solutions for traditional banking system is going to rule the world in the future.
Bitcoin might be an alternative for countries that have an unstable economy, but I don't think it can be for the long term. Because permanently have to paper money. Because the use of bitcoin with blockchain technology does make everything more efficient, so it can reduce unnecessary expenditure and avoid corrupt officials from doing the action.