Brother Laid Off, moved to Equity Trading

My sister has been recently laid off. She is now spending a lot of time on Equity Trading, not F&O. She believes she can outperform the market and should spend time here.

My learning says Passive investment works well in the long run.

How should I convince her to spend her time more constructively - probably finding a new job, working on her business idea.

I guess she is trying to keep herself occupied.