Thousands of cryptocurrencies are floating on the market at the moment, and tens more go live every day. The vast majority of them will be worthless in a few years, when the “Crypto Nova” that is exploding now is more mature and the process of “Natural Selection” has taken its course, killing all those cryptocurrencies that didn’t serve any purpose or were plain scams. Many are in a dying process already now, and many of those that aren’t, are just living off trading traffic or good marketing.

IMO as an expert by Marco Maltese, Bitcoin enthusiast and the author of the book "Enter Bitcoin: How It Works, Why It Works, Why Invest Now, Future Scenarios".

A spread of over 100 USD between two Fiat currencies allows for great profit on international Bitcoin exchanges. The Bitcoin value difference is getting wider by the week between the Russian Ruble and the Brazilian Real currencies, and this difference is also a symptom of how Bitcoin is spreading across the world.