In the current market, the correct strategy for buying BTC and DOGE is to carefully select the timing of entry, as follows:

1. **Buying Strategy**:

- **Buy on Dips**: Buy when the price has not broken below the selected trend channel, prioritizing those core channel supports.

- **Buy on Consolidation**: Buy when the moving averages start to converge and form a consolidation during the selected period.

- **Buy on Pullbacks**: After a slight rise with a small bullish candle, buy when the price retraces on lower volume and reaches a reasonable risk-reward ratio.

2. **Situations to Avoid Buying**:

- **Do Not Buy Large Bullish Candles**: Do not chase high prices when a single large bullish candle appears, the price has risen excessively, or when the price is too far from the platform support.

Summary: When purchasing cryptocurrencies, one should carefully select entry points based on market patterns and patiently wait for suitable opportunities. Understanding these strategies will make investing more relaxed.