Well, for a lot of third world countries, their currency is weaker than bitcoin, so earning bitcoin is really profitable and could help them fulfilling their daily needs

Also, Bitcoin price is increasing from time to time, so it's great for someone who wants to invest their money for something profitable.

And, the anonymity of bitcoin is better than fiat, so if you want to gamble or buying some kinky stuff , you could use bitcoin rather than using banks since your transaction would be reviewed there.