Selling this coin was one of my worst decision in crypto. I am still regretting till now. I sold all at 20k satoshi, Missed huge profit.

yeah, sadly i made the same move, i sold half of my coins at around 10-15$.. but hey, in this world we say " earn or learn". Sometimes you earn, sometimes you learn..this time you learnt. Keep this in mind and act right in the next opportunity.
By the way i don't think that this will be the final price, and i think the price will grow more the week before the airdrop.
Agree I believe still it's good opportunity to buy ZCL now with the current price 0.018 btc, I am expecting ZCL to reach between 0.05 and 0.07 before 28th Feb(official fork). It's completely my individual opinion based on my Analysis. All the best Dev team for the upcoming FORK.