Here's my take as a marketer, merchant, consumer, programmer, and someone who values privacy:
Bitcoin and nearly all other me-too tokens never lived up to any of the core reasons laid out for Bitcoin to exist. It's a privacy nightmare (unless you know what you're doing and spend the money to use tumblers and/or assume the risk and increase costs of P2P transactions while taking other measures to hide your privacy and stay off exchanges). Monero is a lot better at this but in terms of adoption, it's a third rate token.
The price volatility has made it useless as an everyday currency. You have to really be needing to circumvent normal ways of moving money around to take on the cost and hassle of using it.
It's very inconvenient for the average person. The average person gets paid in some fiat currency, usually through some direct deposit or cash in hand. They then spend that currency. With crypto, 99.99%+ businesses still don't accept it, even with PayPal indirectly boosting adoption, hardly anyone is using it to buy things. But say what you want to buy is sold by someone who does accept crypto. You have to either go through some potentially sketchy P2P transaction, at a cost premium, or open an account with an exchange, transfer your fiat, pay to exchange that fiat to the token, then you can finally pay to send it to your seller. And that's not even getting into the fraud protections your average Joe gets and expects from using traditional banking.
The promise of being anti-inflationary may be true of Bitcoin and other tokens with fixed supply of a sane amount but most tokens either have unlimited capacity for minting more or have a fixed limit that is so crazy high that it may as well be unlimited, so there goes the anti-inflation goal for most crypto.
But ok, what about tokens that actually have a reasonable, fixed supply, like Bitcoin. Well that limit isn't some immutable law of nature as most people assume. It's just a limit baked into the code and with the right support, the code can always change. But let's pretend that never happens and Bitcoin always keeps its fixed limit. This makes it inherently deflationary. Sounds like a good thing, right? Well, no, not really, unless you bought in early and held. But since the value relative to inflationary assets goes up, there's little incentive for people to buy in later. So you have these early bag holders who see nice gains in value but what incentive is there for people to buy from them at these higher prices? The assumption that someone else will pay even more? You're just stuck in a "greater fool" setup.
Ideally, a currency should be able to inflate and deflate as the underlying value it represents grows or contracts. With fiat currencies, this is generally based on GDP, per capital spending power, and interest rates. Essentially, the value of that currency reflects the fundamental value of its underlying economy.
With Bitcoin, there are no fundamentals. There's no underlying valuations, it's not based on anything but pure supply and demand. It's ironic that cryptobros love to say fiat isn't based on anything. No, fiat currencies are based on the value of the assets of the country that issues it, its domestic output, its future growth outlook, and in the case of countries like the US, it's backed by the largest military and economic power on the planet.
Now those dynamics can change, but the valuations are still rooted in very tangible things such as property value, manufacturing capacity, national gold and currency reserves, natural resources, human skill and labor, etc.
So where do the few tokens that are actually popular and aren't just waiting to collapse like Tether? In moving money around while avoiding the scrutiny of the traditional banking system (assuming you know what precautions to take and take them). This alone isn't of much use to most people but for those who need it, that's its primary value.
Beyond that, it's just another asset to speculatively trade on. Although unlike commodities, stocks, and forex, which have fundamentals on which you can at least base an entry and exit point on, crypto is pure speculation (unless you're some whale who can manipulate the market).
But I think overall, what crypto has does is stat to normalize the acceptance of using a digital unit of value which is centralized and this will be completely taken advantage of by governments as they roll out CBDCs and use them to not just track everything you make, have, and spend, but threaten you with the power to make your money disappear with a few keystrokes and mouse clicks if you're not a good little obedient pawn.
Just look at how much privacy and control people have given up for absolutely trivial conveniences.
There was just a case of a person being locked out of their house for days because some delivery guy claimed their Amazon Ring doorbell said something "racist" (even though nobody was home and it only played the default greeting). Amazon's response? To lock out the person who paid for this and other Amazon devices to automate his home from their services, for days, based on nothing but an unfounded claim by some random person.
Now imagine an even worse fate than being locked out of your house, perpetrated not by some company but by your government, who has the means to make your assets disappear, or even make you disappear over anything they deem worthy of such a response.
This is what trading freedoms and rights for inconsequential conveniences gets you, and whether or not you believe Bitcoin was created by some government agency or a couple of random guys who somehow were smart enough to make Bitcoin but not smart enough to see that it couldn't possibly live up to any of their claimed reasons for making it, the end result is the same.
The more accepted it becomes, the more governments will take advantage by pushing everyone onto their private ledger CBDCs.
And if you think the answer is, "Well, that will just make non-government operated, de-centralized, public ledger tokens even more useful". Will it? How hard do you think it is for governments with even modest resources to track the use of your non-authorized crypto? What businesses will be willing to risk fines or closure, even prison time to accommodate the use of your now taboo token?
You can take my opinions as some pessimistic, extreme view. And I'd probably agree with you if everything I said wasn't already in place and progressing. The wheels are in motion and they aren't being turned by anyone who has your best interest in mind.