The italian Lira was worth 1/1936.27th of a Euro, did that make it a non-legitimate currency?

100s of dollars are thousands of Yen, is the Yen a non-legitimate currency?

Value means very little, if dogecoin was more widely accepted than bitcoin, it would be the "better" currency.

This entire article was written about one guys opinion.  That hardly makes it a legitimate story!  Just like the recent Jamie Dimon statements, one mans opinion does not de-legitimize what is already widely accepted as a valid currency.  Unit value does not imply legitimacy.  Trust in the fundamentals of any object as a medium of exchange or store of value is what gives it legitimacy.

Bitcoin's non-acceptance by a larger audience is largely due to the technical difficulties (for the average non-computer-literate user) inherent in the current implementation, but that does not make it illegitimate.  These problems will be solved with continued brainstorming and development.

This is a very, very stupid article. You can divide bitcoin in millibitcoins too, does this mean that if a millibitcoins equals a penny (so a btc would be 10 usd) bitcoin would be a better currency?
Bitcoin can be valued 10 or 10k dollars, and this will be completely ininfluent on his utility as a currency

I would calculate optiml price like that: number of active bitcoin users and current bitcoin supply. By the way bitcoin isn't something that needs fixed or dedicated price, we all know how price is calculated and it will be always optimal for it's users because prise depends on trading. You can see how panic can affect it's price but after halvings and popularity growth, it will be always high. If people forget it, price will fall and fall, that's what I like.

It argues that the success of Bitcoin as a currency depends on sentimental value consensus. The issue I have with this argument is that when Bitcoin will be considered a legitimate currency (which personally I feel it already is), it's dollar value will be irrelevant. The article's argument only serves those who undermine decentralized cryptocurrencies as a superior alternative.

it's a fantastic value, in my opinion bitcoin does not have to be a legitimate currency, rather bitcoi as the most profitable investment. because all this time bitcoin developed as a long-term investment and short-term.

I kinda agree and see were they are getting at. Compared to real currencies that does not change much on per-year basis as they said BTC price changed 260%. Meaning that in order o become real currency BTC price needs to be stable (100% agree). Now they got to that 1000000$ price by calculating that bicoin will continue to grow at same pace which is kinda stupid part but still...

Disagree with you, it is not necessary for bitcoins to reach at such high level to become a legit currency. Bitcoin is already very popular, which has been increasing by each passing day; many country's governments has already taken few steps to legalize the bitcoins in their jurisdiction. We could see in the next 5 years that, at least 10 or more countries have accepted and recognized the bitcoins as legal currency.

The author of that article was entitled in his own opinion, but his opinion is baseless without enough knowledge of the world economy, bitcoin would not be fully utilized for that said value and that's too much inflation and determining the real value of currency is through its circulating supply. so a 21 million circulation of bitcoin multiply it to 1 million , that price is too much, unless the coin is self destruct once utilized and then its scarcity justifies its value. so the value is still applies to law of supply and demand.