I do not think that traders are selling their assets now. The market is experiencing worse times, but its unlikely that anyone will want to sell their cryptocurrency so cheap
I agree with you, I am also one of the investors who still survive the decline of crypto, hopefully in 2019 there will be good news.
Early investors are actually waiting for good news since 2009 and even in the middle, in 2017 all of the cryptos showed a huge growth which can be expected again. I am holding some bitcoins from long term which were been bought on the peak but still i don't regret and prefer holding them untill i gain the original value back.
I think regret shall be the last option to give a thought for. If you have not done anything you think you should have, it only takes away your precious time and other backup option you might think of. Many people bought at 2017 peak and I see people regretting about not selling at that time even if they are in huge profit even now.
This thing does makes people take bad decisions and often results in panic trading.
I have faced this, thus I can say this happens.