There's high possibility that Korean exchanges are cheating users without actual cryptocurrencies at their hands but trade them with only figures on trade ledger to make huge profit out of S. Korean cryptocurrencies users.
Korea Seoul central district attorney raided Upbit on May 12th, one of biggest cryptocurrencies exchange with the charge of fraud.
They are under the suspicion of having traded cryptocurrencies without having wallet at all.
Having no wallet for exchange means users can never have any airdrop at all. The value of cryptocurrencies stored at exchanges without wallet shall have severe value dilution without getting any airdrop.
What if you lose all opportunities for airdrops of cryptocurrencies you stored at exchange? As the number of cryptocurrencies increases the value of those currencies will decrease because of supply and demand curve.
With over 1,400 cryptocurrencies on cryptocurrency market the value of any cryptocurrency has been diluted a lot since Bitcoin.
The dilution of the value of Cryptocurrency has not been properly addressed so far and this will surely destroy the future of cryptocurrency.