- Altcoins are, by definition, any cryptocurrency that isn’t bitcoin, which means there are a lot of them: close to 8,000, according to CoinGecko. And considering bitcoin currently makes up [less than half] of the total crypto market cap, more than half of the crypto market’s value is floating around in altcoins. But all altcoins aren’t created equal. Some cost pennies, while others are hundreds of dollars per coin. Some have promising long-term applications, others are a flash in the pan. Many aim to build on bitcoin’s successes, others claim to solve its problems. All this adds up to an altcoin universe that’s vast and full of risk. (Nerdwallet)
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