ouch a sad story, buy 2 btc at 18k, now at 8.5k you've lose half of your total capital.
That's just a small loss compared to what people loss investing in altcoins, but actually it will not be considered as a long if he will hold until the next bull run will arrive. In terms of chances, BTC has a better chance to recover and that $18,000 is not impossible to achieve with the way the market is moving now, I can sense there will be a big bull run coming soon.
With the current price of bitcoin right now, it is easy for bitcoin to climb up and surpass the recent all time high. With the halving event next year, it is a huge green indicator for investors to buy because the difficulty to get bitcoin for miners will be higher so it will be more in favor for investors since based on law of demand and supply, the price will go up.