The amount of money you can earn from Google Adsense depends on the niche your website is in and how much website traffic your website with Adsense gets.
If you're looking at earning $100.00 per day you likely need 10,000 daily unique visitors.
But if your website is in a high paying niche then your earnings could go even higher than $100.00 per day with even less traffic.
Keep in mind that Google Adsense is not a get rich quick scheme and requires a lot of hard work writing lots of content for your website or blog.
And it requires patience. It might take you 5 years of working on your website before you get to a good amount of monthly Adsense earnings.
You have to continue to work daily on your website and put in a lot of hours to get your website earning enough to be considered a full time income and replace your day job income.