So, as many are well aware, Bitcoin saw a huge rise in 2017, peaking over $20,000 in some regions;
Of course, it would be tremendous to see those kinds of gains again in 2018, but with regulatory pressure coming down hard, bitcoin has in more difficult waters than ever before.
With segwit acceptance increasing, and the advent of the lightning network likely by year end, how does bitcointalk think
BTC will perform this year, and why?

It has proven that bitcoins double its current price before the year end and now it has drop again like before however this time bitcoins are about in low level furthermore even almost all altcoins are with its dip and its because of manipulation of the price in accordance of BTC futures which have cause a same big rise and down in the whole market.
In the long run this year i am believing that we can see a massive adoption of the market and a good rise in the ber months this year because of a continuing adoption of digital currency.