I also plan to buy more btc and hold it until the end of 2018, many predictions stating the value of btc will rise more than before
If you have such kind of plan which involves buying of the coins whose market value is little low these days, then this is actually a very good idea as this is the wisest thing to do at time when the market is falling and that you are experiencing some tense situation. You need to feel panic about anything, else you need to avail this opportunity so that you can then have a better living.Indeed, this kind of swings should be a good time to accumulate more because its a good buying point. As what members is saying here "buy low and sell high", this is never more true that today's price. Buy at a discount and just hold on it so that you can fully go a good returns in the future. Please note though that you should stick for long term and not be tempted to sell in there is a crash. We can see the light at the end of the tunnel, so just stay strong, but in this dip and hodl.
