I hope not, life is precious no matter what someone has done. The bail conditions include mental health support so hopefully that will help.
Honestly, I don't even know what the point of prison in this situation is. It won't get anyone their money back, and he's unlikely to be in a position where he can reoffend in the future.
I suppose there's the deterrent angle, but I'm not convinced that there's a meaningful difference between a 10 year sentence and a life sentence as a deterrent.
"I'll just borrow these customer assets until I make it back" probably isn't a thing that someone would be deterred from whether it was 10 years or life. People make crazy gambles all the time for a lot less, and end up indebted to bookies who kill them.
He'll obviously never be in a position where he can make this mistake again, and I think life in prison doesn't fit the crime, especially for a first-time offender.
If he was stealing for personal gain, then sure, throw the book at him. But the available information doesn't make it clear if that's the case yet.