United States Commodities Futures Trading Commission (CFTC) commissioner, Rostin Behnam recently gave a speech in which he predicted that “virtual currencies […] will become part of the economic practices of any country.” The CFTC commissioner predicted that cryptocurrencies will have a transformative effect in providing financial services to unbanked populations, and undermine corruption through increasing financial transparency.
Cryptocurrencies are already connecting the unbanked to global economy, or at least to crypto economy. While it's bad that they often help to boost social media presence of ICO scams by participating in bounty campaigns, at the same time they are earning money that help feeding their families. I hope that in the future people would be more focused on Bitcoin freelancing and wage jobs, since they are much more useful and sustainable than bounty campaigns.
But as for cryptocurrencies for fightning corruption, I don't believe in that, since it would require their adoption on the government level, and it's very unlikely to happen. And even then, there will be lots of loopholes left, so cryptocurrencies can solve this problem on their own.