Hi,
I would like to answer the question
Cryptocurrency
Cryptocurrency is a subset of digital currency that uses cryptography (converting plain text to encrypted text by using encryption when sending and reconverting to plain text on a receipt using decryption) to secure its transaction. It is a virtual currency with decentralized control and therefore no mediator like the bank.
Bitcoin
Bitcoin is a cryptocurrency and global payment system. It is the first decentralized digital currency. Its design is peer-to-peer and transactions are made directly between users, without intermediaries.
So, Bitcoin is a type of cryptocurrency. As in the case of paper money, the types are American dollars, Indian rupees, and so on. Bitcoin is often mistaken for cryptocurrency because it is the first and most popular cryptocurrency.
Airdrop
Airdrops have an open-ended crypto-monnaie free of charge on the process. Il s'agit d'une stratagegie de marketing mise en œuvre par startups bases de la chaîne de blocs afin d'atteindre de fouqué fatiques de la cryptographie. Crédits adoption des monnaies numerics and newcomers have a concept of crypto.
HTH!