loss? as long as you sell the bitcoin you have at a low price then you will not lose at all, however 1 bitcoin will last forever 1 bitcoin only the value changes because there are transactions in the market that cause that and indeed bitcoin will never stable value
As long as you don't sell at a low price, anyone who holds Bitcoin will never lose and will still make a profit when the Bitcoin price turns back towards increasing in the market. Because the rise and fall of the price of Bitcoin has become a very common thing for everyone to witness, so anyone who wants to sell it must be able to ensure that they are not selling at a price that is lower than the price level at which they had previously purchased it. That is the only key to not experiencing loss or loss in holding Bitcoin under any conditions.
Only those who don't believe on bitcoin will sell at loss or those people doesn't have enough knowledge. Since for sure selling in panic will never be their option especially that they aiming to hold their bitcoin for long term. Also instead of getting panic in the dumping condition happened people will always look at the good side then continue to accumulate then they would be glad to have more bitcoin at more cheaper price.
But if they really want to sell then its their sole decision but as you said they make sure that they are not selling at loss since this will really be so bad investment decision they made. Sell at profit is always a good option but you will never do this decision which is to sell early if you have separated funds to be used for their immediate needs.