I just love this graph by charter.co showing how the Norway sovereign wealth fund has used oil revenue to build a diversified basket of investments.
This is where an entire nation has done what I recommended that individual firms do.
The key point is that whatever main business you are in should be being used as a means to something bigger and more diversified.
Every year you should be that much less dependent on your core business.
This is how Warren Buffet built Berkshire Hathaway too, if you want to know the truth.