At some point, lots of people will try to take real fiat dollars off exchanges.. (elementgroup.com)
Gems can then be exchanged for bitcoin and ultimately sold for fiat dollars, Peled explained, meaning users are essentially paid for spreading the network: (coindesk.com)
A malicious user who overpowers a public blockchain network would, in doing so, devalue the currency, so even if they «stole» some coins they would very likely end up with less money in terms of fiat dollars than they had before.» (themerkle.com)