This is a philosophical question.
After the recent rise in BTC at +2K, altcoins began to react very optimistically to the market. Many people are waiting for the growth of bitcoin in the near future due to the upcoming halving. Therefore, in the end, you can be optimistic.
But! the end of the year, Christmas presents, the downtrend from summer ... In the coming months (2019) it is quite acceptable that BTC could fall below the previous local low of 7.5K.