Bitcoin is the one that lead to the existence of the term cryptocurrency. Now there were more and more digital currencies with advanced features in terms of security, transaction access and so on, still they were not able to compete with the bitcoin. This confirms that bitcoin will never be outdated by any other cryptocurrency.
There are lots of new coins built with modern technology and new technology that surpass Bitcoin but Bitcoin will never be outdated. Bitcoin still has the special features that other coin can not get and that is why Bitcoin is still growing as strong today.
Bitcoin is outdated by a lot of other cryptocurrencies in the market. If we are talking about it's origin since it is the first crypto, it is obvious that it is outdated.
But in terms of popularity, of it's feature and it's technology, Bitcoin will never be outdated by any other cryptocurrencies in the market. Bitcoin will always be Bitcoin. To be honest, there are a lot of great cryptos on the market than Bitcoin but it still is the most expensive and most used crypto in the whole world.