Achieving stable profits in spot trading in the cryptocurrency market requires a multi-dimensional strategy:

1. **Strict Risk Control**: Single position ≤ 5%, total position ≤ 30%, set a stop-loss line of 3%-5% to guard against extreme fluctuations;

2. **Cycle Patterns**: Combine Bitcoin halving cycles and Federal Reserve policy cycles for layout, accumulate chips through dollar-cost averaging in bear markets;

3. **Technical Assistance**: Use EMA120/200 moving averages to determine bull and bear boundaries, capture trend reversals with MACD divergence;

4. **Emotional Game**: Reduce positions when the fear and greed index > 90, gradually build positions when < 10;

5. **Ecosystem Screening**: Focus on BTC/ETH and high liquidity mainstream coins, avoid liquidity risks of low market cap altcoins.

One must avoid leverage, maintain a rational annual expectation of 20%-30%, and continuously verify the effectiveness of the strategy for over 3 years.