I just started on this journey so take it for what you will,
I have heard and read alot of good things about Dash.
Saw a video where a guy who is on Steem, don't know his user name, on the video he went by desertlynx, he lives on dash and hasnt had a bank acount for a few years doing that. I read an article by @shortsegments about Dash it can be transfered via SMS, thought that was cool, especially for low opportunity and no bank access people.
As far as use cases, that's what I am trying to focus my efforts on, to show people the benefits and potential.
Caught a CoinTelegraph talk today where they talked about E-payment and digital dollar, very interesting. Had a guy from Monarch wallets, he talked about how it can be used from the merchant and user sides, checked some reviews and the app looks really good. Lots of cool features
Also, kinda use case-ish, the panelists also mentioned Ternio blockcard, you can deposit several popular cryptos (with plans to add more with user input) they get staked as native stable coin, you can use it like a visa debit.
Similar to Crypto.com card but you can deposit many different cryptos.
Another use case story I caught was about how in developing countries with instable govts, there are blockchain solutions being developed for education and professional certifications.
The best use case is still to come, when those trillions they printed hits!

Whatever you do, Dont take investment advice from me!
I got BTC, ETH, Zcash, Dash, XLM, and MCO.
And oh yeah, Hive!
Thanks for all your efforts here
Peace