The answer to the riddle is "water."
Here are the three reasons why it can be dangerous:
1. **Drowning**: Water can cause drowning if someone is submerged and unable to breathe.
2. **Contamination**: Contaminated water can lead to waterborne diseases that can be fatal.
3. **Overconsumption**: Drinking too much water in a short period can lead to water intoxication, which can be harmful or fatal.
Despite these dangers, we need water to survive