While cryptocurrencies are mostly used for trading, I think it is a technology with great potential. There are still several unsolved problems with cryptocurre

While cryptocurrencies are mostly used for trading, I think it is a technology with great potential. There are still several unsolved problems with cryptocurrencies like having to keep a large database on disk and slow transactions (and illegal status in some countries). They are not protected from 50% attack by governments. When they are resolved, it can become really good alternative to card systems. VISA has many disadvantages compared to Bitcoin: - it uses outdated technology and is absolutely insecure (card details are easily stolen and sold in large volumes, they still use unencrypted magnetic stripe) - it can require paperwork and a deposit to accept payments. It is difficult if you do something legally gray (for example, related to porn) - it is difficult to get a card without identification even if you are not going to do anything illegal - transaction cost is high for small payments - US government forbids to use VISA on some territories for political reasons - merchants often refuse to accept cards from some banks or some regions (for example: Digital Ocean doesn't accept some prepaid virtual cards) - companies can collect and exchange customer data when they pay with a card. Because it has your name. - the data on transactions from all countries go through systems controlled by US It is only natural to replace those outdated magnetic card systems.