So as far as I understand it, we will most certainly see natural yield of around 5%. I think it would be a huge marketing advantage if we decided to subsidize it to always be at least 5% for the three main currency bitAssets (USD, EUR, CNY), because that means we can write that as the minimum yield in promotional material.
5% isn't an outrageous amount of interest, but it is significant in this era of negative interest rates. I think being able to use concrete numbers will make it so much easier to make mainstream people curious. If it becomes trusted enough, I could see this becoming viral knowledge between cautious savers especially in China, with people rushing to put their life savings into it if they hear about it from people they already trust - the Chinese are fond of getting on trends about what the safest longterm investments are. Right now we're seeing a housing bubble pop, and it would be the perfect time for them to be introduced to a new safe investment.