Trading should not depend upto the underlying asset, but I guess keeping altcoins out the question is a wise move to make. If your methods are correct both bitcoin and altcoins should give profits, but nobody wants to hold altcoins, for obvious clear reasons.
Altcoins are only good for holding in a bull market, but when you smell that Bitcoin already has its ATH from which it starts to fall, makes a double top, and there are signals of bear market, it's time for exitting all your altcoins.
Holding altcoins in a bear market is like you are living in a nightmare and I'm sure that if you know about it, you will try to avoid a nightmare.
But even then trading is not for everyone, those who are not comfortable with it should only buy at the lows.
Trading is risk and not for everyone, most traders have losses, not profit. Trading in a bull market with Spot, can be easy and can bring profit, but it isn't enough to show that trader is professional and can get profit in a bear market or can defend his capital for avoiding loss in a bear market.
Trading is basically risky and it's more dangerous in a bear market.