That depends on your preference, if you invest to risk in other's business then you should ensure that the business is stable or if it is starting up, they have a good vision and mission. You must ensure as well, that you are putting your investment in a business where your passion can be use, and most of all is that you will be able to enjoy it. That is the secret to last in investing, it is not all about money but the perseverance to succeed and you will surpass all the trials if you love what you are doing.