Thanks so much! That makes a lot of sense. Two questions:

1. Do you have any suggestions for where to store our old non-HD-generated private keys that were generated in Bitcoin Core for public addresses that are still posted publicly (such as within our YouTube videos)? These private keys will still be valuable to us for a long time into the future. Should we just export to a paper wallet?

2. Someone asked me the other day, "How can MultiBit HD be trusted if it isn't open source?" I was under the impression that MultiBit HD was open source, but it seems like I was incorrect about this?

Thanks!