Until now nobody can degrade bitcoin, but if we talk freely only ETH leads to being the better to beat bitcoin, but I think for now ETH can not beat it.
But maybe the possibility of ETH will be the highest ranking.
ETH can not beat Bitcoin because I have been watching ETH for a long time, if Bitcoin is up, ETH is bound to increase but recently we are seeing a decline in this market and ETH is getting very prices low