The future of bitcoin will depend on its price. If price keeps on moving upwards then many people will adopt it as a currency and as a investment too, but if price falls dramatically - BTC will gradually fade away.
Given that price may fall down but bitcoin will not fade away that easily. Looking back bitcoin price is much lower to its current price. Now that bitcoin is known to be a good investment, many will surely invest in it especially that bitcoin price is unpredictable. Its price will surely goes up some time this year.