There was a time when a 4~5% increase in Samsung Electronics was practically considered the ceiling, but these days it's jumping around like a growth stock on KOSDAQ. It's something you wouldn't expect to see in your lifetime. Personally, I think the price of Hynix in the 1.2 million won range will be difficult to see for a while.
I hope it can reclaim its previous high. You've worked hard to hold on.