Bitcoin fell below $84K after being rejected at $89K, with a potential decline to $71K on the cards.Analyst Astronomer sees $83K–$84K as key support, with a caution of further downside risk.Bitcoin is currently priced at $83,089 with a market cap of $1.65 trillion and a 24-hour trading volume of $17.07 billion.Bitcoin experienced a steep correction and triggered market-wide fears of further downside movement.