You have started early and pretty glad you have a good grasp of the bitcoin. You a plan and you are sticking to it. Great job.
The only thing that can stop bitcoin is probably the government.
The government cannot "turn off" bitcoin. The only way they can do it if ever they want to try is to turn off the entire internet, which is not possible. Another way they may choose to do this is to try and gain control of all the miners and execute a 51% miner attack on the network. No matter how long they try to fight it, soon enough they would realize that as a means of survival amid economic and social challenges.