You can earn a significant sum of money from stock markets in GTA 5 very fast and can also lose money soon after a small change in the market. This mission will give you not only monetary rewards but also a chance to become an overnight billionaire. Gta 5 Assassinations And Stock Tips. All the information you need is available in conversation and on the radio. Keep in mind that each character has his momey. If there is any stock rising in price, buy it for all. To earn money safely in LCN, you need to have a golden time of investment in each trading round. You get very little chance for gains. You cannot use your capital when you buy poorly performing stocks. Another thing you should remember that each LCN corporation has a viral. When one goes down, the other, of course, goes up, and vice versa.