Hindsight is 20/20. Use it to learn.
This tool replays real market history. It's fun to see what an early NVIDIA purchase became, but notice the "worst drop along the way". Most big winners fell 30–60% at some point, and holding on through those drops is the hard part.
Try adding a monthly amount to see dollar-cost averaging in action. Then compare any stock with the S&P 500, the benchmark most professional fund managers fail to beat over the long run.