Bitcoin is far superior to other cryptocurrencies for many reasons. It has the largest & most established network providing greater security & reliability.
It is very important because investment is made with trust. Bitcoin network is strong enough to gain trust from investors and is part of factors to convince potential investors to spend money for buying bitcoin.
There is a limited supply making it resistant to inflation & potential devaluation.
It is solid like rock. No one can change total supply of Bitcoin and its circulating supply only becomes less than its total supply with time as more people lose bitcoin and contribute to more bigger lost amount of Bitcoin.
Its decentralised nature ensures that no central authority can control or manipulate it. Bitcoin's widespread adoption & recognition make it more accessible for trading, investing & everyday transactions.
The truly decentralized network of Bitcoin helps it to avoid attacks and censorship on transaction confirmations. It gives Bitcoin users their own banks and no longer rely on banks for capital movements. Bitcoin holders only have to broadcast their transactions with enough transaction fee to get confirmations from miners, then it's done by miners, no engagement from banks or governments.