Brian Armstrong looking for a Coinbase co-founder: https://news.ycombinator.com/item?id=3754664
Here we are, 12 years later, and people still buy and sell cryptocurrency almost exclusively as an investment/bet, and very rarely is it used to facilitate any real transactions.
The tech at its core is really interesting though, sadly the most innovation seems to be in marketing at the moment.
I don't even think the hurdle is that big, I find a lot of "crypto wallets" nicer to use than many banking apps - main issue imo is the risk to loose funds, which is significant even for technical users.
Sometimes, a startup is not the path to solve for a problem statement (but you can still be wildly financially successful as is the case with Brian).