Selling Bitcoin could be beneficial especially when the rate is high. However the timing here is very crucial and you need to also trade in a hefty amount to earn a decent profit.
Yes, selling the bitcoin can might result losing the opportunity because the value has a lot of possibilities in this coming months or years or may the rate will reach the moon like last December so if you want to have better earnings than just hold your bitcoin and retain it. If you already satisfied with the price of the bitcoin now just sell it and buy your desire.