Well it is a personal choice. And it is your funds, you can do whatever pleases you. But and sell is always involved in the investment and trading. Assuming you bought as the rate of $16k and $20k and now it is $100k and after this period probably from next year it would go back to $30k or below. Who lose? Investment is all about calculation. Oh Yes bitcoin will definitely rise to $400k but if you sell it as the time of $100k and buy back at the time of $30k who make the profit? And when you rebuy, you can keep it for as long as you want until the price hit your target. But if this bull is not your target then you can still continue hodling it because it is your investment and you know what you are doing. Good luck for the investment.