Each person own 1 Bitcoin and hold on to it for 20+ years.
Bitcoin is the best investment of all time. Owning Bitcoin is better than owning a house.
We know that that is not going to happen at all, so do not get your hopes up for something like this to happen because it will not. To many people would become rich if that happens.
Its is not possible for bitcoin price to be $1,000,000. It cannot happen in next 100 + years also. I must say that no one can think of such a bitcoin price in dream also.
It is
inevitable that one Bitcoin will be worth $1,000,000 some day because
by design $1,000,000 some day in the future will eventually have the purchasing power of $500 today. Bitcoin has the opposite design and one Bitcoin should increase in purchasing power over time. Eventually the rising purchasing power of Bitcoin will intersect with the falling purchasing power of the dollar and one BTC will be worth $1,000,000.
When this will happen is the real question.
When the bitcoin is worth $1,000,000 some day, the buying power is worth at least $100,000 today. That is due to the value increase, not the dollar depreciation.