I think that Bitcoin will alway be above all other cryptocurrencies. Bitcoin is first cryptocurrency and that gives it a lot. It broke the ice and showed people what cryptocurrency could be or become. Also if it was not the best, it wouldn't have the highest price. Maybe in time it will lose to some other or new crypto, but for now its first.
Yes for now bitcoin is the unstoppable cryptocurrency among all cryptocurrencies. Many people is using bitcoin and a lot of people is now investing with bitcoin. The highest price of bitcoin is one proof that bitcoin is really the best.
I think bitcoin never ever lost its dominance, In fact bitcoin is dominant over all crypto currencies from very beginning and we can expect that it will remain as dominant for ever. Bitcoin is in fact the very first digital currency mainly created for online shopping etc but now we can see that it is even use in local shops for shopping. the shopkeepers interested to accept bitcoin for shopping. The popularity and importance of bitcoin is increasing from time to time, which is making the future of bitcoin more bright.
I guess this is no more than wishful thinking on your part
I refer to your claim that "now we can see that it is even use[d] in local shops for shopping" and "the shopkeepers [are] interested to accept bitcoin for shopping". This is not even close to being a half-truth. The shopkeepers are not interested in Bitcoin as a means of payment (though they can be interested in it as a vehicle for speculation). They are interested in fiat as they have always been. Were it not so, they would accept Bitcoin directly which they don't do since they use payment processors like BitPay and their likes to instantly convert the bitcoins people are paying for their goods and service into fiat. This is the harsh reality whether you like it or not, and you have to face it if you don't want to remain delusional. The popularity of Bitcoin comes via its use for speculation exclusively, not through real life commerce
Real life commerce does fuel speculation and demand though. If you could choose between two assets with similar returns and only one of them was easily and instantly exchangeable for goods, you would go with that one. So whether or not vendors use BitPay as a middleman or not is not relevant to the Bitcoin price and its adoption.
It's certainly true that most people wouldn't want to accept Bitcoins as a mean of payment directly though, since they rely on the liquidity of fiat.