The "Flappening" is a term used in the cryptocurrency world to describe a hypothetical scenario where the market capitalization of one cryptocurrency, specifically Ethereum (ETH), overtakes that of another, namely Bitcoin (BTC). The term is a portmanteau of "flippening" and "Ethereum's native token, "Ether" (ETH).
This concept gained popularity in early 2018, as Ethereum's market capitalization began to approach Bitcoin's. The idea behind the Flappening is that as Ethereum's popularity and use cases continue to grow, its market capitalization will eventually surpass that of Bitcoin.
While the Flappening has yet to occur, Ethereum has become a major player in the cryptocurrency market, with many projects being built on its blockchain and its native token, ETH, being widely used for transactions and decentralized finance applications.
It is worth noting that the Flappening is a controversial topic in the crypto community, with some arguing that it is an unrealistic goal, while others believe that it is only a matter of time before Ethereum surpasses Bitcoin in market capitalization.