I think that the first two questions rely on finding the best answer for the third.
I believe some variation of BI is an inevitability, but singular projects can shorten the total time by years, and atm it seems like BI implemented in 1) full strength, 2) on a small scale (while remaining scalable), and 3) out in the wild, are what's needed to make that initial leap. For BI to receive large interest, development and uptake from the crypto community, it needs to prove, before people's very eyes, its benefits. To me this suggests that it should be implemented within the crypto community, to crypto users and directly tackle issues that they are facing now (all the problems surrounding open-source developer funding) alongside providing benefits they aren't perhaps aware of (greater transparency, but more so, greater resilience as a society/community).
That you participated in the Ethereum hackathon suggests that's where you are heading:
- Appeal to the people that are most excited for revolutionary technology like crypto-powered BI.
- Provide this brilliant community with as fully-fledged BI benefits as you can (a reasonable short-term plan due to the nature of the community).
- Watch as the less progressive areas of cryptocurrency, relative to say the Ethereum community, come join in for the benefits (followed by adjacent areas of the tech community and etc etc.).
At least this seems, judging by past failed BI projects, to be a better plan then choosing all of society as an audience and acting surprised when your huge technical burden gets negligible interest.
In regards to joining later and inflation rate, my suggestion is that they are problems best decided by other developers and users through incorporating DAO contracts and their corresponding decentralized voting mechanisms. I haven't read up enough on this project yet to figure out exactly what you are planning in this regard, but I guess because of your interest in Ethereum you'd be all up in that stuff.
Hopefully some food for thought. I haven't been in this space for long, but by god is it interesting. Project like these couldn't come at a greater time: cryptocurrencies couldn't be doing better, yet it seems the utopian ideas that bitcoin started out with are being hugely neglected. We are quickly entering the implementation stage of blockchain technologies, where we actually have to go about applying and building these new societies that bitcoin was made for, but for psychological reasons most observers seem to be so absorb in the details of development that they've missed that we can actually implement the original vision pretty much now!