I would be happy to see tht price of $11,000 again. According to current BTC price I could have got a huge profit by selling for 11000

The thing with cryptocurrencies is that your window of opportunity is going to be very small and you need to be able to have the knowledge and to be honest the guts to take it, if not the opportunity will pass you by and you do not know when that opportunity is going to come again, so be sure to be ready when the time comes so establish a price that you want to sell your bitcoin for and then sell it.