To be honest, I do not see this happen at all because of the fact that 6000 dollar is way too much for one bitcoin, I also do not think any altcoin is gonna touch this amount any time soon or even later.
42 coin managed it pretty easily. what the hell is up with the math of people on this forum? certain coins number in the billions. others way less. the number of them has kind of a bearing on the price you pay for one of them.