Bitcoin is an asset that goes up in price for all the features that Satoshi thought and gave to it.
For now the price of bitcoin is going up,i do expect a time when the price will be stable in the future.
Today there are hundreds of altcoins and for sure there are some that are much better than bitcoin, and that these will be more used than bitcoin in the future, but bitcoin will be the king of all the new digital gold. People will use other altcoins as well, but the savings and investments will be in bitcoin, and this is for the simple reason that it was the first altcoin, and that people believed in it from its beginnings.
Sure there are hundreds of other alternative currencies and they are trying to follow bitcoin and some try to be anonymous,either way bitcoin will rule without a doubt
Bitcoin is heading to $4,000 usd per coin and I am sure that the price of bitcoin in 3 years will be exponentially higher than is today.
The price has already crossed these valuations and i do expect them to go down for some time and for sure in a very short years the price would be triple from where it is today.