I'll have to read it again to see what his arguments actually were. It boiled down to a few levels of FUD.
1) The lack of dividends is a new one that I'm unfamiliar with. I can't see the argument, as non-dividend giving stocks are highly valued (Google; Amazon) and similarly assets [gold; land]. The principle that any asset that can go to zero in the future should presently be valued at zero, as written, ignores time and present utility.
2) With starbucks coffee purchases, Satoshi didn't write "currency" in his white paper. I wonder whether there were similar connotations about "currency" being smaller "starbucks transactions" in 2008.
Satoshi made bitcoin to store wealth. That's what the initial block is about. Not about small transactions. He could have made a larger block size then, but didn't. I'm glad he didn't. It would suppress bitcoin's price, probably (frequently used things are commonplace, not valuable, oddly). The smaller transactions helped bitcoin grow, but once it peaked beyond them, it priced itself into a larger market. The speculative market possible is much larger than is currently being used for bitcoin.
2b) The other FUD argument often used is the energy usage. I agree in that I don't care about whether I can use it to buy starbucks. A decentralised global solution involving everyone everywhere is a terrible strategy for starbucks purchases. Lightning might work. The energy usage isn't real FUD, because of the auto-compensating difficulty level of bitcoin, which now has 50% less energy usage over a weekend. (Is it half as much as Christmas lights then?) As we've seen, the energy usage rewards miners, while simultaneously limiting miners, which keeps the network going with high capacity hardware. The energy usage has created bitcoin growth.
Failures, imo, would be like a critical bug that would allow to change past blocks without no one noticing (virtually impossible, but well, what if...?).
Of a critical bug that would allow double spending, or that would allow to spend money without private keys and so on. That would be a failure.
Critical software flaws weren't what he was referring to, was it?
There have been a few rare level-2 critical flaws, that luckily haven't yet been (level-1) bitcoin stopping flaws. They could have been.
* There was the bitcoin core ECDSA poor randomisation issue a few years ago.
https://www.researchgate.net/publication/335577495_ECDSA_weak_randomness_in_Bitcoin* Political, social: Governmental/corporate intervention, CSW..
He says that bitcoin is basically a ponzi, that the volatility makes it so that it is not a currency, but a security.
This is why [he says] it failed as a payment mechanism
Personally, I think there is a lot of fuzz about it now but if there will be a big bitcoin adoption there is still uknown.
That may be, but..
The volatility is just enough that it will be further adopted. It attracts new investors. No matter how far bitcoin falls, it will hit some bottom from people who have sold out. Any number of these and new investors will be interested in making a profit and reinvest. It will go up, which will also attract new investors.
Ok, I don't know whether it is used as a payment mechanism. This isn't necessary for its success though. As it rises in adoption, it will increase as a payment mechanism.
Paradoxically, the evolution of bitcoin could be from:
speculation (early idealogues) -> payment (small drugs) -> speculation (moon-bois) -> payment (houses, international settlement), with increased savings from people who have collected along the way.
Even recently, many people have only just been introduced to bitcoin. It takes time for them to become used to the idea. FOMO will set in on larger and larger scales, with plenty of falls along the way.
We haven't seen the end of the bitcoin story; barely the beginning.