Just be careful with altcoins because as some fall, they may not get back to the price you bought them, the only coins that I know you can buy but its price fall and later increase back is bitcoin. Also the way altcoins are falling, it can really be frustrating. As you think some has falling to 75%, it is possible they can still fall more. People buy them, dump them and move to another altcoin and so on. The most frustrating thing about altcoins is that they are not getting to all-time high, which means they are not store of value.
The only hope for the altcoin holders is the BTC Dominance to decrease and that would be the only time when one can hope that altcoins prices may rise. I don't think that BTC. D can stay above and the big correction is very near. Initially I thought it may rise to 70% before falling down but now i think it will be moving down anytime soon.
Hint:- When we see bitcoin dominance is dropped near to 50% level, that would be end of the bull cycle and altcoin run too.