Over the past 90 days, the following 10 altcoins have led the market, with XCN and FARTCOIN emerging as frontrunners with 4-digit gains. According to CoinMarketCap, Onyxcoin (XCN), Fartcoin (FARTCOIN), Hyperliquid (HYPE), Hedera (HBAR), Bitget token (BGB), XRP (XRP), Mantra…