there's reason why so many big investment firm and companies are having their big share of investments in btc and not in alts because they know it's relatively safe investment and could still gives good ROI.
the thing is, with alts even though sometimes the ROI is indeed multiple folds of btc, but it also carries risk, you could judge if you happened to hold coins like luna and ftt i'm sure by now you're already broke but if you hold btc its just losing some fraction of its value.