Now this might seem like a cop-out as this mission progresses as you continue to the main story forward. In "Lester’s Assassinations," Lester will offer Franklin five missions which will require Franklin to assassinate different targets to gain monetary benefits beyond the bounty of the kill. Each target plays
a huge role in a company which has stock available for purchase in the in-game stock markets – LCN and BAWSAQ.
What you may not know though, is that there’s a process to investing in these companies before the assassination takes place. If done right, the player can net approximately 80% return in their investments which means it often pays dividends to wait until clearing the main story missions before investing into these missions.
When all is said and done, the player could net a cool $2.1 billion once all the missions are completed – imagine what you could do with all that cash...