Pretty much any and all major terrorist or terrorist affiliate is going to be put into some dark hole somewhere, where they are going to rot for the rest of their days.
No,capital punishment will not suffice.It will be a "inspiration" for many to commit crimes further.Money is never the be all and end all of life.Money can never be a "source" to equalize the crime committed.
I do believe that capital punishment for terrorist is mandatory. It can make you feel really unsafe if the terrorist do not have any fear from the people and are roaming around the place very freely.