So, don't sell to them instead, hold patiently and in matter of time depending on your goals and assets values, you could imitate them (whalers) or could even be one in the future.
Everyone who invests in Bitcoin certainly does not want to sell before their planned target is achieved. Everyone has their own plan that they consider sufficient to get satisfactory profits. But sometimes, when investors do not have enough reserve funds for sudden needs, holders can decide to sell some of the Bitcoin they have collected to cover these sudden needs. Some people may regret selling their Bitcoin, but when someone is in a desperate situation, then everything can be understood.