Hii , I'm afraid if Bitcoin back below 6K again, should I hold till 20K or close right now?
There is nothing to afraid now. Bitcoin price will slowly increase back to $10k.
If you hold patiently, you will earn your profit later. Hold it or regret.
I think you are right, the beginning of the year is the month in which investors are using their money for real projects. So investments in bitcoin are likely to be withdrawn causing declining prices. but I'm sure by the end of the year investors will come back to reinvest in cryptocurrency.