I thinkthat amounts that will be invested in the big cap coins must be equal with amounts that invested in the small coins. This will make his perfolio can sustain and give more benefits rather than only focusing all in the big cap coins that can increase in long-term or yearly basis.
I agree with you on this, big cap coins like the likes of bitcoin, eth, even bnb could take year's for someone to yield substantial profit but they're still the safest one can comfortably and boldly invest into. However, there are bunch of recently added good projects out there, one just got to do his/her research well.