I was wondering what may be causing this interest in Brazil. I'm a Brazillian living in Canada and I can't imagine it being safe to store gold/silver in Brazil, unless you put it on a vault out of the baking system. They did confiscate money from people's savings account in the recent past and could definitely do it again. You can add to that the fact that storing at home, for example, would be extremely dangerous in Brazil, given the high crime rates there. You put huge taxation on top of that and it is easy to understand the interest in crypto-currencies. Brazil is probably going through the worst economic crisis ever in their history and people are right to protect their money and take it out of the baking system.
D