Bitcoin is better for storing value over time due to its deflationary nature compared to fiat but is on par with gold in the same category. However it performs poorly on being a currency due to its limited supply, and for the tendency of people to hoard it rather than to actually use it. Since bitcoin is decentralized and no single entity controls it, it's a difficult currency to work with for domestic economies given that the supply cannot be adjusted depending on the current economic conditions a country faces.