I'm a strong believer that crypto should be useful in real-life so that people can give it importance. Doesn't matter for people if crypto is money but can't be used for what they need.
It's like having value that can only be seen virtually but in fact doesn't serve for anything in real-world. In order to that sentiment to change towards adoption, there must be places where people can use their crypto. Merchants, more vendors, more marketplaces and services are needed around decentralized currencies.
If people can pay for their coffee, TV subscriptions, pay for a mobile voucher and even pay for a beer in the next pub, people will start noticing and open their minds to accept that crypto is just money. Without that we are facing a harsh reality that crypto adoption will take another decade to be mainstream.
Another thing: "useful crypto will be the ones serving as digital cash - affordable to use as fees are lower, fast to confirm and borderless.