These kinds of proceedings are more complicated than we know and are never straightforward, so I don't know everything about how it works. But from my own point of view, if the victims lost their money in Bitcoin, then the amount of Bitcoin they lost should be what should be given back to them. If a person lost 1 BTC, then 1 BTC should be given back to them. Looking at the fiat equivalent of the Bitcoin would only complicate things. If a person lost 5btc in 2018, he should be given back his 5btc in 2026. If the money was lost in fiat, then he should be given the fiat amount he lost.