If you don't spend your money sure. If you do then you'll only have about 15 million by that point and spending 9 million + just for fossils alone is ridiculous. Also sitting there waiting while the game fast forwards time so you can earn money is NOT making the game more difficult.By the time you can afford a rex habitat and the rex itself, mining it isn't the end of the world. Please don't make the game as trivially easy as the prior entry was.
There is plenty to do while you wait. I like to jump into vehicles to deal with various problems while waiting for money to go up, and can easily pause, issue orders to scientists, and resume driving.If you don't spend your money sure. If you do then you'll only have about 15 million by that point and spending 9 million + just for fossils alone is ridiculous. Also sitting there waiting while the game fast forwards time so you can earn money is NOT making the game more difficult.