What makes a person a trillionaire?

if a person in Zimbabwe has a trillion zimbabwe dollars, are they technically trillionaires even though their currency is worthless. If there was a person in Germany in 1913 who had a trillion marks, would he or she be a real trillionaire? Has any one person been labeled a trillionaire yet?
Answers

Casey Y

People can say whatever they want whenever they want. When comparing wealth, one ALWAYS needs to state the currency(s) in which that wealth is held. You can convert them. For instance, $72USD makes me a millionaire in Indonesian Rupiah...

Clive

Of course. The trouble with "trillionaire" (or millionaire or billionaire) is that it's meaningless because how much they are worth depends entirely on what currency you're counting in.