Everyone keeps asking this question and the truth is nobody knows what'll take off next. The fintech boom was aided by advancement in the adoption of technology and supporting regulation.
I think the energy sector (we can't work without power), the health care sector (the pandemic has taught us) as well as the Web 3 space (the future always seems weird at first), are potential spaces to look out for.
I'll add a caveat here that many times when the market is raving about a sector, it's important to note that there's most likely another 'low-key' sector that's performing equally as well or even better than that people aren't paying attention to. It's helpful to bear in mind that the crowd isn't the sole custodian of truth.