BTC Technical analysis
Apart from the efficiency aspect, the ability to run smart contracts cheaper is what will be revolutionary. Currently, running smart contracts on Bitcoin's core protocol layer is not exactly feasible. It is quite expensive and time-consuming, thereby rendering it almost useless. Many experts suggest that smart contracts would be one of the key selling points for Taproot. To put things into perspective, smart contracts can be used for almost any trivial financial transaction such as paying utility bills to pay rent, among others.
NFA
https://www.tradingview.com/chart/BTCUSD/P6ncMRKl-Taproot-upgrade-1st-major-upgrade-in-4-years-for-BTC-what-now/