Valuations of this kind must be carefully understood. For example, you call unicorns to new companies that reach a valuation of 1 Billion. That does not mean that someone has actually paid 1 billion for it, as the fact of reaching a marketcap of 1B does not really mean that someone would buy 100% of the project for that price.
How does this really work then? Easy to understand with this example:
You create a company with venture capital. The owners and the team have 100% of the shares and there is no real valuation of the company at that point. Your company is doing great in growth, but, as usual, it is burning through money. The owners decide to raise more money. It could by by floating, IPO or a financing round - does not matter for our example.
The owner manage to get a deal selling 5% of the company for 50M USD. The valuation of the full company at this point, since there is only one deal, is set at 5% for 50M, thus 100% (all the company) is valued at 1 Billion. That´s it, it is "an unicorn".
You have probably noticed that this is not fully true. This means that someone has effectively valued the company at 1B and paid a 5% of the share at that price, but this does not mean that anyone would be ready to pay 1B for it or that other people would offer the same valuation.
This is the same when a project floats a small amount of crypto. The price may get very high if there is not that much liquidity and many people want to a have a bit, but saying that is the real value is a long shot.
If this is not a valuation then what actually is a valuation according to you? I think this really is the best way to value any startup or in fact any Company! Obviously the value of anything changes from person to person there is no universal value for anything around the world. If you argue in this way even the stocks that are listed are merely representative values because if the person holding even 5% starts to sell all of them stock price would tank a lot in a day.
Valuation or Value of anything is best measured by "The last price paid by a buyer to purchase it". You obviously can make up your own value-based on your own usage of that asset but someone might value it even less based on his usage. If Bitcoin's price is $34000 today, if someone holding 5000 bitcoins decides to sell it, he might be able to get just $30000 for most of his bitcoins.
Paxmao, I understood your example but I'm afraid people reading it might come away with the impression that this is the case with every company--and it's not. It could be the case that only 5% of shares in a privately held company could give that company a $1 billion valuation, but there are companies whose valuation is lower than what they're actually worth--and those are the types that investors like Warren Buffett likes to invest in (and invariably they're not the "unicorns" of Silicon Valley that I think you were referring to).
With a company that's gone public, it's pretty simple. The market cap is the value of all the outstanding shares, and that's how most people put a valuation on the company. But there are other ways to do so, e.g., by looking at its breakup value, or how much money could be gotten out of it by breaking it up and selling off the pieces. That's what the corporate raiders did so often in the 1980s, and again, they usually did it because the market value was below the breakup value.
Anyway, with crypto none of this applies except for market value--and that makes things a hell of a lot simpler, if you even care about such a statistic. Personally I think it's meaningless. If you're looking to corner the market in a coin (and I have no idea why anyone would want to do that), then it might be useful but otherwise it's a piece of data that gets way more attention than it deserves.
You are right, even in the case of publicly traded companies, no one obviously is willing to buy 100% shares of that company on the total market capital. If we look at it this way the concept of valuation would cease to exist.
A very important concept here is
Synergy It would make more sense for an IT Company to pay an even higher price for a blockchain startup because it would get synergical benefit from it which an automobile company might not get.