Well spoken, your right time may not be my right time as everyone has their own choice to make. There's never an ultimate time to sell because Bitcoin's price will keep changing over and over again and everyone has different target, there are investors that sold when Bitcoin was at $100k and some investors even bought at $100k to sold at $118k and as long as they have made their profit to reinvest again I don't see anything wrong with that and even if new investors buy at the current price now there's still a chance that they will make profit in future.
A person can buy Bitcoin at any time and is very normal when they sell BTC. As you say many people are selling in 100K and selling it at 118k, it is completely based on themselves. And we have seen in the past from 2012 to 2015. Then those who were Bitcoin Holder sold Bitcoin very limited. I believe that if they knew that the price of bitcoin would rise in the future, they would never sell Bitcoin. Moreover, Bitcoin will always be bone and everyone will sell Bitcoin at a very low profit because Bitcoin Holder never wants to lose. If anyone currently buys Bitcoin, then he needs patience. Because the Bitcoin market can now go to a bit of recession.