There is a lot of talk about at what price BTC is supposed to be. This statements are mostly based on the past price of BTC.
E.g. "It can't be 1000 USD/BTC today since it was just 130 USD/BTC 2 years ago"
I think, that is a pretty bad way to look at it.
The best way, I can think of, is what has the price to be, when a certain amount of people use it. Imagine in 10 years 100 Million people worldwide are using Bitcoin in some way(I don't want to discuss, if that is a good estimate, since the title of the topic is "if it succeeds"). Looking at the current market cap of ~$ 3 billion, that is just not enough. That means that everybody can just use an equivalent of average 30 USD.
Any other suggestions on how to determine a good price?
It all depends on the demand and interest in btc. But it's also important to look at the obvious stumbling blocks such as security and the more and more prevalent understanding that btc is not as anonymous as many believed. But the security aspect is definitely the price crippling agent in my opinion. There's just too much general uncertainty and even if we all agree on what the price should be, rather or not it succeeds, it really doesn't matter until btc is further established and businesses that act as "exchanges" do their part to actually ensure security.
Actually, btc has already succeeded and look at where we are. Huge volatility and no agreement in price stabilization.