Bitcoin daily chart remains in a medium-term bullish structure, but the momentum at high levels is clearly weakening. The MACD red histogram continues to shrink, and the RSI has fallen back from overbought conditions. After a rise, there is insufficient upward momentum. This indicates a high-level “top grinding” phase and a potential for a market turn at any time. The strong resistance levels above are 83,000 and 81,800, while 78,000 below is the key defensive support.