Honestly? If I were launching a new coin today, my coin would have to do something Bitcoin doesn’t.
Bitcoin is great for storing value, like “digital gold.” But it’s slow, not very flexible, and not ideal for everyday use. So my coin will be able to help you buy a coffee, use for rewards in apps, or other perks in real life... I would even design a wallet fit for beginners with no tech jargon, seed phrase, bla bla.. just some 2 step verification kindof stuff, so everything keeps rolling and easier for doing transactions.
Ahhh.. the ifs and buts and maybes..

How you would be differentiating it in compared to fiat? Basing up on what you have said then it all fits on what we do have in now.
Also you should consider out that tons of altcoins have already solved out Bitcoins main problem or issue:
•Scalability?
•Interoperability?
•TPS?
If we do tend to look at on the current market today then we have been flooded out with those type of coins on which had been solved out Bitcoins main problem, but still looking
at on overall rankings that we do have in market on which still that its sitting on #1. Why is that? Nothing beats out the origin of cryptocurrencies on which it is that with Bitcoin.
Nothing beats out community support and recognition and thats why it do sits up on the top and thats not a shocking news. Project developers would be that trying out to make a new project or coin/tokens
on which making it unique as possible but considering that copying up coins or projects features and other capabilities then there's always those copy cats and thats why its hard to tell on which
are those projects will be having a taking a shot on taking up some marketshare.
For the sake of answering this out then i would definitely be sticking with good TPS and with cheaper fees on which if we do speak about making use of day to day basis without needing up to wait for confirmation on transferring between assets then this will be the main priority.