I don't think that bitcoin will become the leading currency. For me, bitcoin is an idea. It will be difficult to use bitcoin in real life. I think stablecoins are more suitable for this.
You are right but i feel it'll not be difficult if you recognize the way to use it properly. Bitcoin is that the first to exchange the market. Many coins have come after Bitcoin but cannot compete with Bitcoin. But hopefully, Bitcoin will still rise through the facility of electricity.
Btc is still the most preferred coin among investors and people who want to buy bitcoin. May be in coming years we would have some other coin which maybe close to bitcoin in terms of demand or so but for now one should always have the btc in their portfolio along with some other stable coins which will be individuals choice.