1. Wait and be patient/have patience

2. Wait until miners traded all their bitcoins for real dollars.
3. Wait until 50 goes to 25 goes to 12.5 goes to etc until it reaches such a low level that it's not worth it anymore.
4. Wait until miners decide that the transaction fee is not enough for them to continue operation and start attacking the network in hopes of higher payouts by crime.
Thus I do believe that in the future miners will turn against the bitcoin system. So it will auto self-destruct

All that it requires is some patience lol.