what you say turns out to be wrong, the current condition of the price of bitcoin is falling, making the price of bitcoin unpredictable and a lot of losses due to falling bitcoin prices.
It seems like the current stable situations which have been fluctuating here since the start of this year in between 6k dollar and 8k dollar but the gap is now limited to 6k and 6.5k dollar which is not a big gap.
The downfalls are due to demand rate as we were expecting better future and investors late in 2017 did not sell out as they were looking for some more increase but that did not happen and now conditions are not good for them but they have one solution that is to hold it for more time.
The price of bitcoin won't falling continuously have believe that it won't go blow from $6,000. Wait for the next year and hold your 13 btc as long as you can.