The main reason for investing in any of these options is the need to obtain financial security, among the assets the "gold" and the "silver" are the only ones that maintain their value over the years, increase but hardly decrease, so directly is one of the best options for any citizen, now well ... Bitcoin has been a successful discovery, like cryptocurrencies, at the moment it is one of the most profitable businesses for long and short term gains , although this current may vary. We have to wait because you never know how much can happen.