If you have made a decent profit on your trades, there no point in regretting that you could have gotten more, because it's impossible to make perfect trades. If you're selling at a profit, you're gaining real value and losing some imaginary value.
Just to make it clear, my regret is not the price point I sold.
I am concern about who are buying the coins, where will all these coins will go eventually. The coins I sold has already planned for some purpose, one is re-buy if the price drop significantly or invest in real estate.