Facebook is one of the most popular websites in the world. It has about 500 million active users. The founders of Facebook becomes very rich, one of the richest man in the world. However, I do think that Facebook has some weakness which endanger the future of Facebook.
The largest risk is privacy. Everything wound be stored in Facebook and cannot be deleted. Who knows how the information of the users would be used? Everyone wants privacy. It is difficult to control others to post your photo on Facebook and tag on it. The best way to avoid your photo to be seen by others is not to use Facebook. Apart from photos, friends could easily get many information such as friends, school and place of work from Facebook. The privacy setting of Facebook is not enough to let the users to feel safe.
Another risk is the lack of new points in Facebook. I mean the lack of interesting and attractive items in Facebook. People use Facebook may because it is new to them. Some Facebook games such the one created by Playfish are very popular in the past. However, people are less interested in the mode of Facebook games as the mode is repeated for many times. Some people are even get annoyed by the numerous email notifications and the message posted by other's applications. To be short, Facebook is less interesting as time flies.
The last risk is the competitor which aims at certain target groups. As Facebook is successful, many companies create similar website. Twitter aims at the one who like to share about their status. MSN Spaces has more customization by gadgets. Moreover, Facebook may not be the first choice for those English is not their mother language. There are many local social websites such as Qzone, Vkontakte and Cyworld. Some people use Facebook before may because there is no localized social websites.