There are many advantages of bitcoin like Direct Transfer, Greater Liquidity, Security and so on. Bitcoin's maximum supply is limited to 21 million coins.
It is worth mentioning that among them all, bitcoin is also the most decentralized, also I believe that old Luna and FTT are not the last altcoins that will fail people to the extent that they will lose greatly. It is wise to invest in bitcoin.
Which currency you think will lead?
There are tens of thousands of cryptocurrencies (altcoins) that have been created, bitcoin dominance s of today is over 46%. Ether which is the second with the high dominance is not even up to half of bitcoin dominance.