Is 19.3 trillion doable? If history is about to repeat itself (dollar will lose >97% of purchasing power in 100 years) than after 100 years we will hit this number and bitcoin wont even pump. It will only remain current purchasing power (~30 000$).
If Bitcoin was to achieve a price of $1 million per coin, the market cap would be $19.3 trillion. Doable?
Inflation-adjusted $1 million or $1 million no matter what that 1 million would buy?
Obviously, we're talking about the actual value that $1mil has today. Assuming things will stay roughly the same, $1m in nominal value is just a matter of time.
The problem is where are all those money going to come from since a lot will either sell for $ or for goods and other assets so you simply have to insert a matching number value back into the system just to keep the price, and if we look short term, so that's two halvings you would still need to cover up $250 million in newly issued coins each day only to keep the balance.
Few things to consider:
1 - wealth (including bitcoin) tends to get concentrated in the hands of a few, rather than getting equally distributed. This will accelerate even more when regulated institutions get a green light to include BTC on their balance sheets. If BTC proves to consistently appreciate in value over time, it's unlikely that any of the big holders would decide to dump it all at once. That means less and less bitcoins are on the markets available for sale, so you pumping its value becomes progressively easier.
2 - new people are born every day, so it's not like the retail market will get saturated and the logic "whoever was interested in Bitcoin has already bought in" is flawed.
3 - lots of bitcoins are being lost forever (people lose their keys or die without passing them to others etc) and fewer bitcoins are being mined with each halving.
4 - people who bought in are unlikely to sell it all when the price goes up, but rather just a portion of it, so they can enjoy the immediate benefits but still have skin in the game in case it goes further up. If Bitcoin proves reliable in appreciating in value, why exchange it for depreciating fiat if you don't have to?
Second is what users will perceive bitcoin at that time, it's easy now to get investors on board, the price is 20k , it was 3x times not so long ago so 10x returns sound plausible to a lot of people, but when the price would be half of the target, like $500k, do you think there would be that many with hopes of another 10x in another halving.?
That's true, but if public perception of Bitcoin shifts from "get rich quick" to something more of a "store of value+" that would be a good thing in the long run. Plus, I don't imagine that hotheads gambling on coins going >x10 overnight are as significant to the market as they used to be.
Bitcoin has the potential of stealing (some of) gold's lunch as well as replace cash if we are to move to a cashless society. Will there be enough for $1 mil per coin? I don't know. But the opportunities are still there.