I think we will never see 300's again. Me and people like me had suspicions about bitcoin but most of those suspicions are gone now. (I admit i still have doubts but nothing big) Bitcoin only exists now because people trust it. Without people's trust, we wouldn't have seen the huge recovery after finex hack.
No we will not see this indeed anymore because its something that is very hard to do, the bitcoin is already to good to be honest.
I think that it only can go up from here to be honest.