Bull and bear market, summarizing some principles:
1. In a bull market, buy more as the price drops, provided that position control is managed well.
2. In the later stages of a bull market, only sell long positions, do not buy.
3. Capital is king, manage risks.
4. Moreover, wealth is accumulated over time; thinking of getting rich overnight is basically impossible, that load of crap won't fall on you.
5. Buy when no one is paying attention, sell when the crowd is roaring.