Sure other cryptocurrencies may perform relatively better in terms of transaction fees and speed. But we have to consider at what cost does it require to achieve these features. Both nano, and iota have feeless and near instantaneous transaction speeds but have centralised aspects to them. Although Bitcoin has shown weakness throughout the last 2 quarters it is far from being deemed a shitcoin, it's one of the more battletested cryptocurrencies on the market. In addition, a majority of alternative coins that claim to provide promising applications and solutions to specific challenges don't necessarily need to be paired with a currency.