The
VAT (Value Added Tax) is the local equivalent of sales tax. It is not charged on exports to outside the EU.
The €108 (plus VAT) pricetag is for one of the smaller copies, with only 120 grams of silver - that's 3.86 troy ounces. They've only made the one giant one, just to break the record, and don't seem to want to make any more. The small ones have a mintage limit of 2,008 pieces.
As for storage of giant coins, I like what someone said about the giant Canadian gold coin: just leave it sitting there on the coffee table. Any thief will do their back in trying to hoist it.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis