There is definably something fishy going on.
There have been multiple 200,000-900,000 dumps daily starting on the 20th of May on Cryptopia.
The volume at the time of the biggest dump was 900,000 in a timespan of 15 minutes.
Look at the transactions in the last days:
2018-05-24 Thu 1960 2296444 - 42 3,751,084.706 OFF 1.49 ± 77% 38.25926986
2018-05-23 Wed 1894 2294484 45.6 41 3,307,775.963 OFF 1.51 ± 71% 36.97028987
2018-05-22 Tue 1638 2292590 52.7 8 755,913.582 OFF 1.05 ± 61% 31.97060989
2018-05-21 Mon 1570 2290952 55.0 17 1,112,333.978 OFF 5.78 ± 90% 30.64256989
2018-05-20 Sun 312 2289382 276.9 8 834,195.453 OFF 21.36 ± 52% 6.07382998
2018-05-19 Sat 93 2289070 929.0 7 384,544.428 OFF 536.9 ± 94% 1.79675999
2018-05-18 Fri 23 2288977 3756.5 2 369,424.072 OFF 1561.9 ± 33% 0.42966
These numbers are huge and fit the amount of sell-off on Cryptopia.
Either this is all a huge coincidence or someone is "printing" coins.