Think about it. The marketcap for BTC to reach 1mm/BTC would mean massive mainstream adoption. Also, it would mean tons of random NEETs that happen to store a couple BTC suddendly join the 1% clique.
And, let's say hypothetically that 1 BTC reaches these ridiculous prices. What will be the purchasing power of 1 BTC? Wouldn't basically mean that the USD dollar devalued itself 1mmth times? Even if it went to 1mm/BTC, so what? you could only buy a cheese burge with it.
If BTC would reach the price of 1mil USD and if you would then only be able to buy a cheeseburger with it, there would have been no mainstream adoption.
Besides this I believe in 1mil USD per bitcoin, as I believe in unicorns.