> I'm not really happy promoting a cryptocurrency these days, given that most of them are get-rich-quick schemes

I can't agree with that sentiment at all. Sure, there a those schemes, but most of the time they are easy to spot. If you have a look at the top 50 coins on CMC [0], you will find mostly solid projects that have large ecosystems with much brainpower locked in.

[0]: https://coinmarketcap.com/