Not really. To date, Bitcoin has been used successfully only as an alternate store of value -- one which, like gold, doesn't depend on the financial credibility of a particular government or country. Bitcoin's continued existence depends only on the integrity of its distributed consensus algorithm, which so far has withstood all attempts at hacking it. The "alternate store of value" opportunity is not small. Gold alone has a current market capitalization of $12.9 trillion.[a]
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Let's see if Bitcoin is comparably volatile…
Oh, it's highest point was only 1920% higher than its lowest point. That's definitely the exact same as gold. /s
Also, that ignores that gold has been a store of value for millennia. It's almost synonymous with wealth. In a total financial collapse, if all modern technology dies, you can be sure gold will still have value. 99.9% of people have no idea what Bitcoin is besides funny computer money.
People who believe that it would be "easy" to trade gold for other goods have also clearly never tried - since the entire modern banking system came into existence on the basis of the sheer difficulty of directly trading gold for other goods. No one knows how to value gold, they don't know what it's worth other then a brick is probably a lot. If they could, then the fake jewellery scam wouldn't be as successful as it is[2].
[1] https://en.wikipedia.org/wiki/Price_revolution
[2] https://www.kiro7.com/news/local/just-say-no-walk-away-fake-...
Stores of value are things like stocks, bonds, treasuries, real estate... and yeah commodities like gold and bitcoin. People don't care so much about volatility if they're planning to park their value there for a long time.
https://en.m.wikipedia.org/wiki/Store_of_value#Money_as_a_st...
A good store of value is scarce, durable, transferable and divisible - and I think most people agree that you compromise scarcity to get price stability.
We don’t have to take anyone’s word on this though you can just look at what endowments and wealth funds hold to see what people believe are the best stores of value: https://www.nbim.no/en/the-fund/investments/#/
A double speed attack doesn’t need anything particularly dystopian to happen. It doesn’t even need to result in a large transaction just someone deciding to short BTC and briefly having the computing power to destroy it. Even just a creditable attempt that fails could completely undermine it.
The only way around that is to constantly spend more money on hashing power than any attacker, but that cost is effectively unbound. Trying to stop some random billionaire doing it for the lulz means sky high transaction fees forever. No problem for an actual currency in widespread use, but a serious issue for a hypothetical store of value which needs constant investment just to break even.
I've used this to purchase goods both online and in person seamlessly. Custodial solutions (trust another party to hold your funds, like a bank) are turnkey. Right now the truly non-custodial solutions (i.e., run your own lightning node) are definitely in the realm of hacker/tinkerer, but continue to improve in terms of accessibility.
You can tip people on the nostr protocol. stats are on zaplife.lol
you can tip musicians on wavlake
there's a Minecraft server called satlantis where it is used as a currency
there's a lot of plugins you can use to build your own lightning enabled apps on lnbits
the space is still young so a lot of software is beta, but there's plenty to play with
check out the plebdev course on udemy if you want to dive into lightning development
The one from Bloomberg comes to mind: "He tells me surfers sometimes ask if he’ll take Bitcoin. He’s taken it on a few occasions, but the dips in price burned him. “Now I tell them it’s $25 if they want to pay in Bitcoin,” he tells me. “You don’t know when it’s going to go down.” " [1].
That's also to say nothing of the leader of the nation potentially losing millions of public funds day-trading crypto on his phone, the Bitcoin Bonds that no one bought, or the IMF refusing to offer funding to the impoverished nation as a result of this callous fiscal policy.
[1]: https://www.bloomberg.com/news/features/2021-06-17/world-s-b...
Without any real way to convert back and forth into real money, what reassurance is there that the price even means anything when every single holder is incentivised to lie and transact with themselves just to keep the numbers up?
How can a global system capable of five transactions a second ever be integrated into “the world’s financial fabric”? Side-chains seem to just be a great way to centralise around more unknown entities who may or may not run off with your cash.