At the current rate it requires 107 BTC foe each address to become a dollar millionaire. However, it should be understood that since the metric is tied to the dollar price of the Bitcoin it fluctuates.
In that regard, to compare with, the number of addresses which contains 100 BTC has lower volatility.
The Bitcoin addresses with more that $1 million balances hit a record high during the 2017 Bull run. Meanwhile, the other metric remained largely unaffected by it.
It serves as an indicator in the Bitcoin world with a very low variance through the years.
Among other possibilities it can also be the case that addresses are being controlled by large entities.
Meanwhile there are over 1 million of Bitcoin which are mined by the creator.
However it is still not known that how many Bitcoin millionaires prevail in the market. Theories have suggested that it can be somewhere between 1 to 13290.