UI is the point when interactions between machines and people happen. It lays down the parameters of a user's interaction with a machine.
Falling Knife
The term falling knife (also known as "Catching a Falling Knife" or "Catching the Bottoms") refers to the action of buying an asset which is rapidly declining in price.
Active Management
Active management in crypto refers to an investment strategy where portfolio managers actively make buying and selling decisions to try to outperform the market and generate higher returns.
Testnet
An alternative blockchain used by developers for testing.