With 500k price each , for the only 16m btc currently existing, that is some 8 trillion Usd , some 10% of global gap.

Ok. That will happen only if price of dollar collapse  and America becomes Zimbabwe

Some thoughts only for brainstorming. Not for evangelists

1. When bitcoin get's accepted into big investor community, etf etc, do we expect to see analogies by what is happening in gold silver etc? I mean suppresion of prices by naked shorts etc?

2. If we suppose that  there are x number of real owners of the some top 19000 wallets that are millionairs by now,  can we actually say that they control the price? They hold  some 65% of the mined btc till now and they have a pretty good chance to control more in the futue since miners are included in the top.

3. How can bitcoin be used as a currency , when everybody just hold it as something unique on our universe? Hoping the price will go to a million? It will just be a digital asset for value store. ( and speculation of course). Unless you expect that by splitting the hard codded btc many times , will be enough for having btc in every house and the top guys being in quantrillion position

4. If the price reach 100k as mang dream, the top guys valuation will be 1 trillion . Some will even be richer than the known billionaires ( as listed by forbs). Sounds realistic

5. If there are 21 millions btc in total and their price will be skyrotec, how someone could valuate 100 paintings in total by monet or picasso? They are rare too, and hard defined by their number

6. When the banks or the governments realize the potential of blockchain technology, what will stop them from creating something similar? Even same code by changing name like buttcoin, fuzzcoin, shitcoin, and put also a hard number limitation.

By saying the above doesn't mean that there is no room for enough speculation yet to be seen. Some just provocative thoughts  . On purpose i don't refer the technical difficulties of network and speed of execution of a transaction.