BTC gradually, tends to increase. Occasionally even if the exchange rate is change, since its inception till now increment is noticeable. In my opinion, on some countries officially creation of active use with BTC shows the increasing of its value. If it is not an unexpected event the next 3-5 years noticeable increase on 5-10 times. Also, on former past work stoppage of many coins of Poloniex resulted as people keep away from subcoin. Subcoin also well-known and has potential to increase on future. But BTC already is certified. Maybe seperately they can contunie their activity.