I think the way you use is pretty good, and it's true that bitcoin is currently not very valuable but I think with prices like that bitcoin is still quite high and that it is still very profitable.
Thanks. We are entering a phase where the fact that bitcoin and some obvious alt. coins can be relied on simply to continue to exist regardless of the price of the coin. So efforts such as private blockchains can always tie into public blockchains as a sort of index, no matter how rudimentary. I have written about this on Research Gate am publishing through IBM:
https://www.researchgate.net/project/Kloctal-An-Octal-System-for-Simple-Cryptocurrency-Messages