Buy and hold died. Follow the gurus cautiously. Some are blind. Buy dips. Buy momentum. Market is unknowable. Food always in demand. Energy too. Charts are like statistics: they can say whatever you want. Momentum + price action for swing trading.
Investing since 82. Felt the pain of the 87, 00, and 08 crashes. All fiat money is subject to devaluation. Most trading is now done by HFT-bots trading among each other. Won't chase any stock/ETF. Over 25 years experience as a networking geek.