Investing is like

fishing

Risk

Both fishing and investing have a high risk; in fishing you risk your pole, bait, and time without knowing whether you are going to catch anything or not. With investing, you are risking your money.

Reward

Fishing and Investing also have a high reward; the reward for fishing can be a large fish for dinner and the reward for investing can be large capital gain.

Time Span

Both fishing and investing can either take a long time for something to happen or things can happen very quickly, so you always need to be on top of your game.