Bitcoin leads other cryptocurrencies too much. I think it is impossible to surpass Bitcoin this year. So I think the winner this year is still Bitcoin, but I believe Ethereum will have better development in the future.
ETH does have a pretty good development but not enough to shift bitcoin. I think Bitcon will always be a winner and become the No.1 coin in crypto because Bitcoin is the main coin in crypto.
I think this will be very difficult for Altcoin to defeat bitcoin because the price of bitcoin greatly affects the price of altcoins.