I did not sell my coins, but in the contrary, I took advantage of the price correction to $780 to buy a good amount of coins. I think it was a better decision than selling at $1,100 because the price eventually will return to +$1000, but hardly to $600 or $500 to buy more.
Bot things can and most likely will happen. But on general is always hard if not impossible to sell at ATH or buy at bottom. You can even end up doing exactly opposite, so best is just as you said, buy as cheap as you can and then spend them only when you need to.