1) No it's not, if that person has so much many in a PaySafeCard (PSC), something is wrong, because it's weird having so much money and not being able to use a credit card.

It's basically a prepaid-card system for kids or people who can't use a credit card to buy stuff online (you go to a shop, buy the prepaid card with money and use it online). Not many (international) places accept those, if any, because it envolves fees. I've used them several times (on Steam and europen online key stores) and it's safe to use, but that amount of money is ridiculously big to be "real".

2) You can't, you can only "trade it with a converter-guy".
3) Nope.