Disagree. BTC will never be useful for day to day transactions. Other coins and blockchains are going to innovate around BTC and be used for that purpose.
BTC niche is "digital gold". But don't take niche as a bad word. If total value of BTC gets to 25% of current physical gold market, or around $2Trillion, that is a huge price per BTC.
BTC will need new users - they are coming. And new regulations. Although not a lot of regulation is needed or required for the "digital gold" niche.