Some people just participate in the bounties and wait for few years. they don't sell their bounty rewards for low fiat reward. Ironically those people become FIAT millionaires. 
Thx for bounties! Good jewelry.
I dont see any bounty hunters to hold their bounty for years. most of them are just holding their token for months until the price of their bounty will go up.Thx for bounties! Good jewelry.