A common critique of Bitcoin (CRYPTO: BTC) is that it is outdated technology in the fast-moving world of cryptocurrency and it will eventually be replaced by something better. There are different versions of this theory, with some saying another decentralized cryptocurrency will overtake bitcoin as the best crypto money and others saying bitcoin will eventually be made obsolete by central bank digital currencies (CBDCs).
Let's focus on the former theory. The Ethereum (CRYPTO: ETH) network's underlying ETH cryptocurrency has the most support. During the initial coin offering (ICO) bubble of 2017, various crypto market commentators claimed that ETH overtaking BTC as the largest and most popular cryptocurrency is inevitable. Although this didn't happen back then, the idea of a "flippening" taking place has gained traction once again, as the BTC-denominated price of ETH has nearly tripled so far this year.
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Source Fool.com