I don't believe this variant. The supposed hacked exchanges have nothing to do with the price of bitcoin. Can you explain how this is possible? There are to many factors that affect the price of bitcoin but the reason give by you is not true.
They have everything to do with it. What do you think the hackers do with that money?
They go and sell it in another exchange, and thus decreasing the BTC price.
There are 10 months that the price is in those levels. No one exchange has or have to much money to last so long the selling of those (the hacked supposed ones). So the hacked money must be finished now (if hacked). Must be sold already. Supposed with the low price. And supposed time ago was finished this selling. Why the price don't go high again?
Ok but there were some scams before that too, and after.
There is a minor heist every week in the bitcoin community, ranging from 50-500
BTC, and its probable that those scammers exchange it to fiat as soon as possible.
Add up all heists, scams, robberies, hacks, and other frauds, and you can see that the majority of those get sold and they have the big downward pressure in the price.
Plus the reaction of the other traders to these. I mean things like these make bitcoin less trustable, so the price will go down anyway.