Putting eggs in one basket is actually not wise. There are so many coins that exist until now. So many best coins like eth, bnb, dot, vet, uni etc. I prefer to buy some coins which I think are best to reduce my risk.
That's on you, I mean if you are trying to split the risk then probably it's not for you but if you believe that the coin you are going all in has a potential then you will do it, I mean what could go wrong now because bitcoin is here to stay and it's not like it's going to go down or collapse anytime soon so I think it's alright if someone puts all the investment in one basket.