To earn $100.00 per day or more from Adsense you're gonna need a high traffic website that gets at least 3,000 or more daily unique visitors.
You'll also need to be in a niche that has a high CTR click through rate and a niche that pays well for each Adsense click.
You can earn more than $100.00 per day with Adsense if you work hard on your blog writing stellar content and do keyword research and write on topics that get a lot of search traffic per day.
You should write your blog around keywords that have searches of at least 3,000 searches per day or 90,000 searches per month.
If you can write one blog post that gets 3,000 searches per day on the keywords and you rank for those keywords then that one blog post will bring in 3,000 visitors per day or 90,000 visitors per month which can earn you some decent money through Adsense if the topic is in the right niche of high paying Adsense keywords.