To put it simple most of your alt paired with btc. When a crash was incoming, people would want to exchange their bitcoin back to something more stable like USD fiats, as fiat only pairs with btc or other major currencies, people temds to sell more and cheaper alts to BTC as thats we knew altcoin would suffer more lost than bitcoin, its a cycle so you have to be quick with entry and exit in alts
True that, I have been slow in selling my alts and converting them to BTC and later on changing to USD, so I have lost some profit. We need to actively monitor stuff closely. This way the flow of conversion will not hurt us and will eventually benefits us in the long run.
if all traders did the same strategy as you did, then we are really seing why the price of bitcoin crashed, you see, trading depends on the market share of a specific coin.
we must help a Beginner to understand all the process for them to be able to follow all the instructions and share your knowledge to them because we also start on that situation.
Well not all trader have the same strategy, some short their holdings and buy on dip, while others just keep on holding, and other buying. So this thing make trading more interesting and challenging.