Don't start trading a stock lightly; missing out can cause anxiety, selling too early can be painful, getting trapped can feel reassuring, but once you start, you'll hold on forever.

However, you don't know which stock will surge first or which will suddenly crash, so it seems best to allocate to ETFs, like semiconductor ETFs or optical ETFs.
I call it the "King of the Sea Strategy," casting a wide net, which actually works better in the US stock market.
Most people's returns can't beat the index or ETFs; if you don't believe it, compare it yourself.
The painful lessons learned after selling $MRVL and the summary of experiences 🥲.