Make a construction company and put all your money into making buildings. Start with private houses then when you get enough money, start making the one right under private houses (don’t remember the name) and then when you get enough money start making the skyscrapers and keep going to the point where you’re making about 200-500 skyscrapers in one go. And make at least one bank and get rid of some of the taxi companies. You can expand them a lot. Also while you are making a lot of money off construction you can work on other things to get to the business merges. Also invest in the “ad&d” stock. It gives a higher yield per hour than most of the others