Google Adsense is very strict in managing their program
You should make sure you never breach of any TOS of Google Adsense because Google is smart enough to control their program even a little mistakes. I also have one article to show you how to avoid getting banned from Google Adsense that is 14 Popular Mistakes Need to Avoid Getting Banned from Google Adsense. Sometimes , you just think that we don't do anything wrong , Google will not banner our account. It is right but you never know what gonna be happened in the future that maybe one day you just clicked on your Google Adsense Ads accidentally and you got banned. I really read some stories about this situation , so you should be careful to work with Google Adsense.
Someone is jealous of your success and want to kill your Adsense account
That's simply to explain that there are a small part of people who know about Google Adsense but they could not earn anything from this program. So they feel very upset and want to pull everybody to be like them. When they have a negative thought , what will they do ? They will surf around the internet and give for someone's website a thousand of clicks to their Google Ads. If you are a person who not luckily was in this situation, your account will be banned and that's also meant that your main income was also destroyed by some " stupid " people.
Lose all income when Google block your account
According to some people , Google Adsense is their main income so they stop their job and spend almost of time to concentrate on making money with Google Adsense. This money will help them to support their family even making them richer. However, that is really risky if their main income is cut off and they drop to a tough situation that is who will support their family and who will pay their bills. Honestly , i am working part-time as baker at the moment and i really hate this job which is very hard and require you wake up early in the morning. Why do not i just stay home and focus on making money online with Google Adsense , my Google Adsense income is not very much but i think it is enough to support myself and help me to have a good life. However, i just think that what will happen if my account was banned and i lost my Google Adsense income, it gonna be very struggling to start everything again.
Google Adsense is not only one way to make money online
Some people believe that Google Adsense is always the best program to make money online. It is right with someone but not at all because you should remember that Affiliate programs can pay for you more than Google Adsense. You can earn 10$ per sale or lead even 100$ while Google Adsense just pay few bucks per clicks , it is also depend on your traffic or your niche ... In addition , you can sleep well when you are working with Affiliate Programs and don't need to worry too much like working with Google Adsense.
There are all the reasons why i would like to recommend you should not think that Google Adsense will always be your main income. However, according to me Google Adsense is always number 1 and the best make money online program at the moment.