When the Bitcoin will reach its limit.
And it continued to grow, you think the price of Bitcoin will increase?
The internet has still yet to reach its limits, 2 billion users vs 7 billion people. There is a long way to go before bitcoin can reach full potential maybe 20 years would be a conservative estimate, could be longer.
2B is not bad, considering babies, the elderly, people with some kind of disability that makes it impossible to use, etc , so 7 billion sounds too if we consider the above.