if you are already tempted to sell some or all of your bitcoin within the past 5-ish months then how are you going to be able to continue your investment into bitcoin for 4 years or more... perhaps you don't really know how to consider bitcoin as an investment rather than a trade, efven though you did use the word investment to suggest that you were actually investing into bitcoin.
In the past few days, weeks and months that bitcoin price have reached some unpredictable price making multiple all time high, alot of bitcoin holder have let go of their bitcoin holdings, and at that in there minds they consider that as taking profits but in the real sense you are right to have called them trader's, because only trader's will have such short term investment journey in mind for bitcoin and I must say that majority of them are future or derivatives trader's who gamble on the Bitcoin price for sort term buy.
But no long term Bitcoin investor will ever let go of they bitcoin even if the price reach $150k to $