Just buy some or at least one. Hold it for 5-10 years. Try trading it and you'll get rekt. Don't ask me how I know 
So many people never imagined bitcoin will ever get to this value in the beginning of this year and that really caused a lot of people to miss the best show of their life. Anyone, who does not want to miss the next show from this point forward, should rather find somewhere to borrow some balls to buy into bitcoin. A time will come when people will wish they even bought at the rate of $20000.