Bitcoin is a crypto currency, all currencies make upward and downward trends from time to time. Bitcoin is and other Crypto currencies are taking over the world economy. See every dip as an opportunity to buy more.
Invest now and smile at moon
Bitcoin will never be hopeless. But we shouldn't splurge ALL our money on bitcoin (just my opinion). BTC is still 6k+ USD. Compared to it's 4k USD from september and it almost reached 20k USD on December. Who could have imagine that in the last quarter of 2017 will be like that .