Altcoin season warming

CoinMarketCap builds its Altcoin Season Index from the performance of the top 100 non‑stablecoin tokens versus Bitcoin over the past 90 days and defines "Altcoin Season" as when 75% of those coins outperform BTC. (coinmarketcap.com) CoinMarketCap’s top‑100 performance table shows individual altcoins with outsized 90‑day gains — RIVER listed at roughly +469%, KITE at +145.6% and large names such as ETH at about +27.5% over the same window. (coinmarketcap.com) Bitcoin’s market‑share metric slipped from 59.2% last week to 58.7% in the latest CoinMarketCap dominance snapshot, a 0.5 percentage‑point decline that reflects growing altcoin market share this period. (coinmarketcap.com) CoinShares’ weekly flows report recorded $1.06 billion of inflows for the week ending March 13, with Ethereum‑linked products drawing roughly $315.3 million — the largest single‑asset inflow that week and a sign of institutional interest beyond BTC. (coinalertnews.com) Santiment flagged that four of the highest‑ever daily trading volumes for spot Bitcoin ETFs clustered in late February–mid March (March 2: $31.6B; March 18: $21.4B; March 19: $21.1B), even as flow trackers showed net outflows on some of those high‑volume days. (app.santiment.net) Market analysts noted contemporaneous technical signals — a break lower in BTC dominance and a reversal in the ETH/BTC pair — that have historically coincided with faster rotation of capital into altcoins during prior alt‑runs. (ethnews.com) CoinShares’ data also shows Bitcoin ETP assets under management and selective alt interest coexisting — Bitcoin products still dominate AUM while smaller inflows into assets like Solana were recorded (Solana products posted positive weekly inflows). (coinalertnews.com)