I'm new, but learning something everyday.
I like bios/ tech, but they must have fundamentals.
Read everything you can.
P.S. If you try to pick the bottom every time, all you get is sticky fingers.
P.P.S Use stops.
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.