[tyingq]

Close to cryptocurrency, but reward points seem like a good use case. That is, something very seamless to move rewards around whether they were earned for a hotel, airline, credit card, etc. Points.com takes a pretty big cut for that (centralized) service today.

Money transfer as well, maybe. I don't know the space well, but it seems like MoneyGram, Western Union, and similar charge a high premium for their services in some cases.

[companyhen]

Stellar Lumens is one of the top coins working on remittances, IBM is partnered with them. It's also a non-profit. Highly recommend doing some research into this one.