Of course, a stable "price" is desirable in the long run, however, it is unclear to me what a fair stable price would be. It depends on the economy and the speed at which goods/services and money are exchanged.
Consider a hypothetical example just using bitcoin as a payment for manual labor: if all work done by all humans on earth would be paid for in bitcoins, and everybody would get their wage at the end of the month, then the value of one bitcoin must be high enough such that this payment can happen using the "free bitcoins" available to employers.
Simple-minded calculation (may be off by two or three orders of magnitude): there are around 7 billion people, of which maybe half work for money. Average annual hours per worker are between 1400 and 2200, so monthly hours roughly between 120 and 190. Let's assume 150 for the sake of simplicity.
That would be 3,500,000,000 * 150 = 525,000,000,000 hours of work. If the total possible number of bitcoins (about 21,000,000) were used to pay the wages, one bitcoin would need to pay for 25,000 hours of work. Hourly wages differ considerably, of course, I'll just assume 1 Dollar for the sake of simplicity, too. This is quite a bit lower than actual wage in high-end economies, and a bit higher than actual wage in low-end economies.
Under these assumptions, the value of one bitcoin should be at least 25,000$ to be just sufficient as salary for all of earth's workers. Naturally, you'd need to consider that goods need to be bought and that people would hold savings, and that a good chunk of the 21 million bitcoins might be lost and thus not available, so the actual value would be quite a bit higher.
In reality, it is very unlikely that the world wide labor force (or any significant part of it) will ever be paid in bitcoin, let alone the goods on global markets, so I would not bet on such an outcome.

Onkel Paul

why whouldn't matter? everything with utility has value so more utility higher price.
if the whole planet start to using bitcoin we would see a big pump.

When bitcoin first started, the price was not important at all. However, when people start to use it to replace money, hold it as asset and join mining for profit, price becomes an important factor for the participants to continue with bitcoin.

I agree that the price of bitcoin acts as an incentive to promote participation and, in that regard, the upward  trend in price is attractive.  But, if the price was allowed to reach some form of equilibrium and it was appropriately scaled, will we be left with a system that is fair and equitable?  Or, will we be left with a lopsided system in which a minority controls the bulk of the resource again?  It's a big question, and the direction it takes along the way will ultimately be the deciding factor of whether or not the experiment is a success or failure.  It seems that the price doesn't matter as much as its utility which enables control over personal wealth and productivity.  Bitcoin is so much more valuable than its exchange rate....It could be a path to freedom for many....it just depends on the direction the world allows it to go.

the bitcoin price is a direct result of the limited amount of bitcoin, and for bitcoin to be used on a large scale it needs to be worth much more.

For example, china has a total of $30 trillion in savings. Right now there's about 15 million bitcoin in circulation.

If even 1% of chinese savings were converted to bitcoin, this would mean 1 bitcoin would be worth $2000.

And that's only (a fraction of) the chinese savings, the worlds savings are more like $300 trillion.

So bitcoin has to rise, a lot.

yes price of bitcoin is important. if I was the one who took the decision of an investment then I was the person most responsible for all the results obtained.

The price of bitcoin is important. Its value is one of the factors that drives people to use it. Some take bitcoin as an investment because of its ability to rise in value. Both the price and usability play a big role for bitcoin to stay in the mainstream.

there is no question in my opinion. bitcoin price determination depends on how the market acts. the higher the price of bitcoin, the greater the bitcoin users in the world market.

Of course it is important. Would you care or even holding/earning btc if price doesnt important. The bigger its price the more important to you.

price of bitcoin is very much important for us. if bitcoin price goes high then we will be rich in no time. actually our total extra profit totally depends on the price. so we should not underestimate the price of bitcoin.