Binance Coin (CRYPTO:BNB) has faced a 5% decline, dropping from its recent high of $725 to $643 amid a six-day rally.

Concerns arise as Binance loses market share, evidenced by decreasing trading volumes and a drop in BNB Smart Chain activity.

Regulatory challenges in the U.S. and Nigeria contribute to Binance's reduced trading volumes, impacting BNB's performance.

Additionally, technical analysis suggests further downside potential if BNB fails to maintain support levels.