Use "risky venture" in a sentence

1. As you start moving up the age ladder the tendency is to be at peace and you are looking at more comfortable life rather than risky venture

2. both plans and achieves complicated and risky ventures, showing

3. He obtained an insignificant amount, and with it embarked on a risky venture

4. These are risky ventures and though rewards can be high for a success, the chance of failure is also pretty high