Central banks are trying to put bitcoin in their definition of money and it doesn't work and will never work.
Their definition of money is stuck in the 20th century. We shouldn't worry about it and move on and the definitions will have to be changed in time. When people were travelling on horses and shooting bows there were many laws that later changed or became forgotten when they didn't do those things anymore.
It's more than money even other people thought it didn't work. This has been proven for years and it sustained a strong foundation despite of fud and fake news circulating, which competition tried to pull btc down. Bitcoin is a form of digital money and not in a physical form, which you can use it though web network. It can only be appreciated through modern gadgets like phones and computers, you can use this asset using this technology gadgets.