Cryptocurrency is a digital and global money system. It allows people to send or receive money across the internet, even to someone they don't know or don't trust. Money can be exchanged without being linked to a real identity.
One of the differences between using bitcoin and using regular money online is that bitcoin can be used without having an internet connection to link any sort of real-world identity to it. Unless someone chooses to link their name to a bitcoin address, it is hard to tell who owns the address. Bitcoin does not keep track of users; it keeps track of addresses where the money is.
To generate a coin, a miner must solve a math problem. However, the difficulty of the math problem depends on how many people are mining for bitcoin at the moment. Because of how complicated the math problems usually are, they must be calculated with very powerful processors.
Cryptowallets provide a handy way to keep track of all of a user's public and private addresses. Because addresses are pseudo-anonymous, anyone can have as many addresses as they want. This is useful for dealing with multiple people, but it can get complicated to manage multiple accounts. A cryptowallet holds all of this information in a convenient place, just like a real wallet would.
Cryptocurrency is the next step in worlds economy. It is called Economics 2.0