Which investment sites online do you think are safe?

There are a lot of sites online where you can invest some money. There are sites which you call HYIP wherein you invest money which will give you daily commissions from 1% up. There are investments wherein you are required to upgrade in the site to gain greater income. There are also investments that makes you pay registration fees to be able to join the site, and many other different types of investments. We know that taking out money can be a risky business, so I want to ask if you know some websites that can make your invested money safe and secure? What are they and how did you figure out they are safe? What sites are risky and should be avoided? Any opinions about investing online can be shared here...