The top altcoins are less susceptible to wide swings in price, the have higher market caps and the teams are less scammy, Many have spent considerable length of time developing their platforms, less pumps and dumps. They are less risky
I think that the top altcoins in this market will be hard to collapse, if buying altcoins outside the top 100, the price may collapse several times in a short time. But for the top altcoins, that will never happen