Investing in altcoin at the moment is not bad, in fact if the price of BTC continues to fall, it is much more attractive to continue buying Altcoins, because that is the logic that governs the market, of course everything is based on the fact that if you buy it right now it will not It should be sold unless it is in eventual profit.
For me the best investment will always be BTC, but altcoins represent great power if they are bought very cheap and sold very expensive, and those are the opportunities that few see.
When bitcoin is experiencing a decline, a trader or investor, in my opinion it is not good to wait for bitcoin to return to normal. We have to stand on 2 feet, that's how I feel. The choice is in the altcoins.
But I don't agree with your opinion about withdrawing bitcoin assets and then transferring them to altcoins. Because when bitcoin goes down, it's an opportunity to buy, not sell. But it comes back to each of us.