Tough for him, but good for crypto. This is an example to other crypto start-ups and exchanges. Now, they know that they have to behave, otherwise they'll end up in jail.
Whether 25 or 100 years is ultimately irrelevant. His life is messed up and it's his own fault. I feel more sorry for the many people who have lost a lot of money through his scam. I wasn't affected myself, as FTX was rather suspicious right from the start to me. However, I know someone from my circle of acquaintances who lost crypto worth 160k euros. He only invested 12k of it himself (so the actual loss is limited), but these cryptos had risen sharply in recent years and he wanted to buy a house in the near future for his young family. This dream is dead now.