The last block included a transaction of $8000 worth of BTC, that cost $0.01 and took 1 minute: https://blockchain.info/tx/2d7a1605ed319ac3e2cf281390ca6dd8252df9479dc5aef8bb2f4ef387360cf7

In what world is that too slow or too expensive?

But bitcoin is now recognized as a parent of cryptocurrency and blockchain technology. Although the technology itself was invented before bitcoin. Of course, a lot of cryptocurrencies is a Scam. But some cryptocurrencies imply unique developments. And if these developments are usr=pedestrian, then such cryptocurrencies can displace bitcoin.

I think that if there is ever going to be a currenty that features something that the bitcoin network doesn't ( for an example, if a new way of processing faster transactions would be founded and would be adopted by a new coin), soon enough bitcoin will catch up and also adapt this technology.

The whole cryptocurrency community knows about bitcoin and supports it, and bitcoin has been proved to keep a value for 9 years, I can't see a reason how it goes away.

at the moment its not entirely about Fees and Speeds. There are other factors which
have to be considered like adoption by investors, thats you and me, adoption by
merchants willing to accept crypto as a payment option and currently BTC has the
greater of both! it is easier to buy goods and services with BTC online more than
any other crypto.

In my personal opinion, I don't think there is a crypto that is bigger that Bitcoin. But, for small investor, they can always turn to altcoins.