Very astute observations Sharon - you're being pragmatic!

I can only speak for myself here, others may be of a different mind. I don't think the existing system is going to continue for too much longer.
At some point in the near future, barring massive depopulation, the middle class of the first world nations are going to be left with next to nothing and the lower class with less than that. Such a situation will not bode will for the existing power-structure, and by that I mean the existing monetary system. It is at this point when we can offer new solutions. If we are able to have some functional small scale 'test' system going by this time (or even further along and actually fully functioning), such might prove helpful towards that ends. Realistically, it will likely take some time to integrate into society.
Certainly there are a growing number in the US congress that are aware of the fraud perpetrated by the existing banking system and I believe that it's just a matter of time before the house of cards collapses.
In the interim, I'm investing in silver, food, and community networks, while striving to promote alternative technologies like digital coin.
My answer to both of your questions then, is that we cannot as a whole do much with an alternative paradigm while still within the existing paradigm. We can however work to build the new paradigm, knowing it won't be widely adopted for a while, but confident that it, or another like it, shall be adopted when the existing paradigm collapses.
At the end of the day, people want a medium that can facilitate trade. When the existing medium becomes worthless, they'll be looking for these alternatives.