the most beneficial coin is the BTC coin, because the BTC coin that likes a lot, the BTC coin is a very high coin of all coins, if you want to invest in the BTC coin.
It is one of the best coin and you should always have this coin along with other coin in your portfolio. Never leave this coin out because when the bull run happens it is the first coin to start rise and then other coin start following this coin.
Bitcoin is best forever, we can't compare it with other altcoin. Basically, it is first coin in the world which introduce to the world's people about crypto. So also in my thinking bitcoin is all the time profitable coin.