One of the objectives you will need to complete in this week's challenge is to develop an addiction. To do this, you will need to perform an addicting activity until you become addicted to said activity. So, for example, if you go to the club in the game, you can become addicted to alcohol if you accept drinks on more than one occasion.
You can also similarly become addicted to various drugs if you accept them when offered more than once, and the same goes for gambling. If you gamble at either casinos or the horse track repeatedly, you will develop a gambling addiction.
That being said, if you want to complete this objective, simply pick one of the activities we mentioned and spam it every year until you become an addict. We also recommend trying both the drinking and gambling options as they can be done easier than other ones.
Related: How to make friends in Bitlife
How to get rid of an Addiction in Bitlife
Once you get an addiction in Bitlife, and after you complete this week's challenge, you always get rid of it by visiting the rehab tab. Under this tab you will have various options to get rid of your addiction, choose one, and you will eventually get rid of your addiction.