Yes, Bitcoin is the leader among cryptocurrency, he has legs to stand on as opposed to others. Most altcoins rightly could be considered a bench. In fact, they do not provide any new features and available options can be easily implemented using the sidechain. Besides altcoins not particularly known.
I think to this day it is true that bitcoin is still the leader of the cryptocurrency, for Bitcoin is much better than the other crypto. But it is possible in the future leaders of the crypto will change in line with technological developments. So it is only temporary, and we don't have to worry because the future remains very bright bitcoin
I don't even think that there will be a cryptocurrency that will be better than bitcoin. Or at least nothing that I can think of. The other alts are just way too far behind bitcoin and the alts were probably originally created to support bitcoin trading.
Monero does have other valuable features that BTC doesn't have. Please don't misunderstand: I am a big fan and user of BTC, but there are use cases for which BTC is not the best coin. Monero:
- came from a completely different codebase
- is untraceable, whereas BTC can be traced since all transactions are public. There are companies whose specialty is tracing BTC transactions. Coinmixers only obscure transactions. As the companies get better at tracing, the coinmixed transaction today that is "99%" untraceable could become easily traceable in the future since everything is in blockchain.
- is 100% fungible. BTC isn't because BTC coins can and have been blacklisted and/or blocked, making them worth less than other equal amounts of BTC. This can't happen in Monero.
- is private. There is a rich list in BTC. A rich list isn't possible with XMR. Any coin with a rich list can't say it's private.
I believe both BTC and XMR have very bright futures.