I think it is quite stable for those using solar power, and I think that if Bitcoin becomes really successful, there will be a large number of individuals striving to learn more about this field, just to get into the mining business.
that's what I'm trying to learn right now mate on how to use solar energy to avoid the cost for electric bill I know the capital that's needed is really huge but the opportunity to roi in much faster time can be achieved, and you are correct after bitcoin succeed more people will start to look for this opportunity too.