Sharing information about business coupled with various investigations is said to be a flagrant way of accomplishing goal by some individuals. Whereas others have dubious feelings about that and do not spread it spontaneously. Here I will divide into 2 parts where I will provide correct answer
On the one hand, when you are determined to start a business, it is not always bad decision to tell it to your relatives as a sample. Sharing information with your closest people might be a right way of making your further commercial path more successful. Basically, gathering with your loyal friends and arrange a meeting, where all of you are able to share with your thoughts and ideas. For instance this method is often used in current best-known companies, as a Microsoft, Apple, Samsung and so on, namely even struggling with budget issue, tackling them effortlessly.
On the other hand, there is an omen of not spreading about any your upcoming deals, if you want to succeed in it. Naturally, it will not happen. This omen is mostly spread in Muslim countries, where you can hear familiar words. It has a point, because in case you do not achieve your aim after having said about your intention will be awkward, being humiliated for no reason. However, being sure of yourself gives you enough motivation and confidence not to stumble forward or back, only provide you with inherent solving.
In summary, share information about something huge purpose only if you quit confident to accomplish it. However in opposite case, you must focus on it fully not telling anyone not to have doleful outcome