Altcoin, explained simply
Any coin that is not Bitcoin.
"Altcoin" simply means an alternative to Bitcoin - Ether, Solana, XRP and thousands of others. Some have real use; many fade away.
Smaller altcoins usually move much more than Bitcoin in both directions, so they carry more risk.
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Start freeWritten by Coin Healer for beginners. Information only, not financial advice.