Thanks for sharing this @wagnertamanaha. What do you think about it? I know that (not surprisingly) interest and investment in Bitcoin and other Cryptocurrencies has skyrocketed in recent months in Brazil. I suspect that the intention behind this proposal is much more to control the market ("reduzir os riscos das moedas virtuais contra a estabilidade financeira da economia") rather than to protect us as consumers! :)
As a comparision, one only has to see how poorly money left in a savings (poupança) account has faired in recent years (although there has been some improvement of late...) - http://g1.globo.com/globo-news/conta-corrente/videos/t/todos-os-videos/v/com-inflacao-menor-poupanca-tem-maior-rendimento-real-em-11-anos/5935558/
In other words what I read was: How are we going to tax and profit from it?
Yes...that is about the long and short of it... In no other country that I have lived in does your money in the bank actually decrease over time....
However, I very much doubt that the proposal will gain much support and on the positive side, discussions over Bitcoin / cryptocurrency may have a positive effect.