For steady income anything with bitcoin is not possible i think. I suggest you find lower risk investment, such as 510% interested, and live off the interest. If you invest like $100k then it is $5,000-$10,000/ year. Bitcoin is risky. I dont think that bitcoin can provide you with steady income. It's always fluctuating.
100k dollars is not a small sum. Not so many young people have such savings. Earn 5K-10K dollars a year is not very much and not enough to a year for them to live. I think this amount is enough to protect your savings from inflation. Earnings need to look for another.
Yes ,invest the earnings in different investments to make more money . I think theres no way of having steady income unless you are in a job which your salary is fix by the end of the day you work in particular date.