It is just a little push back and in the next 48 hours Bitcoin price is likely to cross $20,000. So, one can easily sell and that point but why you want to sell you can hold for some time and you may get better returns at the end of the year but also the market is highly unpredictable at the current time creating a scenario of panic among small holders which are confused to sell now or wait but waiting too long may also lead to a greater loss.