Anyone noticed that the value of Bitcoin has risen quite a lot the last half year, regardless the price of bitcoin?
Whoa what do you mean by that? The price is the measure of how valuable a Bitcoin is, isn't it? I don't seem to be getting what you're trying to say here. Please enlighten us, man

The utility of bitcoin is the sum of the benefits derived from its applications by its users.
The value of bitcoin is the size of its transactional economy over a given period.
The price of bitcoin is wherever the market happens to clear.
Only in the case of perfectly rational actors under perfectly efficient condtions will these three coincide.
I don't agree, this is just delusional stuff you are talking, a value of a bitcoin is exactly what it can be exchanged for (in terms of goods and services) compared to what can a dollar (or gold, Euro, Yen...) be exchanged for.
Edit: with this logic: gold has no value and a visa card have more value than a Bitcoin.... see this is just horseshit.
That is part of the reason that some people in this thread deem you as "retarded" b/c you cannot seem to differentiate concepts, and what makes it worse is that you fail to recognize your inability to differentiate concepts and then to insist upon your own inadequate view of the way that things work in the world.