Bitcoin Dump - The Worst Thing
When BTC dumps, all other coins also dump, it is worst thing because even if bitcoin dumps, then it should not effect the other cryptocurrency price value in BTC. i,e when BTC dumps the price value of altcoins is also drops while it should increase because btc downs. When people will realize it that it is not in their benefit?
Let us always assume that if there is a dump, there would also a probability of trend reversal nor changes of price action. When bitcoin crash, expect that altcoins will follow the same path.
I think it could be beneficial once you hit the bottom pick. If you bought when there is a decline in the market and sell when it reaches again the peak. But it is really hard to achieve.