Bitcoin was and remains the undisputed leader of its segment. A clear testimony to the foregoing is the Bitcoin dominance index. The first crypto currency, as well as numerous analogues, has significant volatility indicators. There were periods when quotes for alternative koinas grew much faster than Bitcoin's. This created a favorable ground for spreading alarming forecasts about the future fate of the first crypto currency. Moreover, many foretold the triumph of Etherium, Lightcoin and other alternative currencies. But in a short time Bitcoin proved its vitality and, I hope, will prove in the future.