It's their choice and they can't pass on it because there's still some hope that's left for them and they need to be patient on it while waiting for its recovery.
Theyre in similar boat as people who bought BTC at $70k
While for the other coins, it's true that many of them are also sitting in losses and even much more because the coin they've bought aren't known and probably made a rug pull which has no way of recovery.
XRP has grossly disappointed its investors, who thought since it is used by banks to transfer money so it will boom, but it never performed well even during the bull run of 2021, it used to be top 5 coin on coinmarketcap in 2017 when its price peaked to about $4 but since then it is on decline and who bought it at peak are in huge losses.
It is also facing lawsuit filed by SEC for illegal offering of unregistered securities in the US. The matter is in the court since long time and unlikely to be settled soon, which further diminishes hope of its recovery.