Cryptocurrency
is a type of digital money that exists only online and uses special technology called blockchain
to keep transactions safe. The most well-known cryptocurrency is Bitcoin
, created in 2009
. Other examples include Ethereum
and Litecoin
. Unlike regular money, cryptocurrency is not controlled by any government or bank. People use it to buy things, send money, or invest. Its value can go up and down quickly, and different countries have different rules about it.