I don't think many people realize just how much money already exists.
To give you an idea: the ECB is creating between now and next 2 year 1000 billion Euro out of nothing, thats 1e12 euros. All this only will cause some minor inflation of some percentagepoints.
As a comparison in 2 years time about 2.6 million btc are created. Divide those 2 and you get a really big number of euros per bitcoin.
This is just to show what could happen if bitcoin would be accepted as a curreny next to the euro or usd. The value would rise immensly (and not to 100k, but to several million per btc).
Will this happen? Or will the btc value just linger or go to zero ? Nobody can tell you.
For me the main reason for a rise would be some external event triggering this: major European country going bust, even events with Greece or end of Eurozone could make things moving VERY quickly.
If that happens the financial world could shift enourmous amounts of money very quickly. I think now several of them are just slowy accumulating in case of.
To be able to absorp the rise, the bitcoin protocol needs to be readyto play in the major leage and lots of development still needs to be done. But I think that is coming along nicely.
So yes I think 100 bitcoin will be a lot of money. It will in fact be a huge amount of money. When is difficult to predict.
Also when btc starts rising it will be immensly difficult to keep all that 100 btc together. There's just no way somebody can keep his nerves when seeing btc rise to 1000, then a few thousand, and so on.
Everybody will be tempted to sell off some (or even a major part) of it.
We've seen that happen in the rise from 0.01 to 30 and then again from 2 to 1000.
As for the value of the bitcoin being a too large number (it IS a psychological barrier if the value would be several 1000 or 10000 or 100000). You can allways revert to using the unit of mBTC, µBTC or even 1 Satoshi)
good point, bad conclusions.
Let's take M0 money supply, just for US dollar.
according to this source:
http://de.tradingeconomics.com/united-states/money-supply-m0, it is 3 840 341 Million USD. Today.
Now, let's compare that to the current Bitcoin market cap. it is, according to this source:
http://coinmarketcap.com/, 3 583 Million USD. Meaning 1000 times less.
So, a small fraction of M0, for now. Now, how realistic is the assumption that Bitcoin can increase its market cap 10, 100, 1000 times from here?
Financial meltdown? Well, it should have happened back in 2008, and we are kicking the can ever since. I don't see it coming any time soon. Too big to fail, simply.
The question is, would Bitcoin survive that long?