Dont sell everything,just sell if its important. Or just sell half of all your bitcoin and the other half will be use in the near future.
It is not the best idea to be selling all of your Bitcoin because they Bitcoin can still rise again which can allow to make money.
Wait for the price to be higher because if you are patient then it will pay off in the end.
You are right. The bitcoin price has risen in the last 7 years. It might rise again when it is developed further.
The development is keep on and always be in progress what must happen is mass adoption because if all people or let's say 1/4 of population of the world.
Then for sure the price of bitcoin is going to be in demand and that is going to be an advantage for early adopters.
That is why it is better if you are not going to sell your bitcoins today and just wait for the further price increase.