If you're a well known and successful trader, there are many ways to make a side earning other than trading. For example, you can try to open class for teaching other newbie traders and share tips about trading as well. Remember, knowledge is a valuable tool for you and others too.
In fact, a lots of so called gurus are selling their knowledge by providing classes, this is a good venue for additional side job for those people who have good understanding within this investment ventures.
Having the right skills can bring more people to entrust you and buy your guides. It's a good source of income to use for your investment..