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.