In your opinion, bitcoin is an asset or a currency?
It just evolved though, it was really design as a payment system. But there are individuals who I will say take advantage in the beginning and when bitcoin has a price, then it become a asset.
If bitcoin is an asset, it is now. Most people will hold bitcoin as an asset and take advantage of the rising price of bitcoin. If so you are still dominated by fiat
Yes, hedge against inflation, and store of value too. So there are a lot of uses of bitcoin, so it's up to the individual on how they are going to treat it.
If bitcoins were currency, it would be complicated if bitcoins were used to buy cheap things, transaction fees would be very expensive
Your argument is invalid though, it's not that complicated, there are countries already who uses LN for fast transactions. And there are still merchants who are accepting it as mode of payment but maybe the numbers right now is not that big.