In the crypto world people are paying million times more for bitcoin than for altcoins, even though these coins essentially have the same features as bitcoin.
This is just like saying dont buy Ferrari rather buy a toy car of Ferrari, as both looks same. So why wasting time for real Ferrari.
BTC consensus algorithm till date is most robust and no other consensus algorithm till date has been developed to beat that. That's just one aspect of BTC superiority there are too many to discuss here.