Bitcoin is still first and favorite choice because its first currency and people interest is in bitcoin. Altcoin can give you more and high reward but bitcoin is still secure blockchain. Whenever we talk about cryptocurrency to accept as a payment fir daily use first currency is Btc.
Bitcoin is in great demand because of its limited number, many supporting investors, unique and also it is a very innovative alternative side by side with fiat currencies. We know that both fiat and cryptocurrency have their advantages.
Bitcoins are like gems in the world of fintech, bought for collection and storage. This is due to the ineffectiveness of Bitcoin being used for daily transactions.
The scarcity is the big pro that Bitcoin has compared to coins with endless emissions like Dogecoin or even Ethereum. If you look at it from that angle many coins don't have a limited number as they argue for economic reasons. That's fine though and in my humble opinion both camps can be true. Bitcoin is scarce and a store of value while other coins make more sense in for other use cases and therefore need continuous emission.