The thing about these everything apps is that they filled a niche in the markets they’ve succeeded in. As far as I know, and I could be wrong, Google doesn’t operate their Play services or Google Pay in China, meaning there was a vacuum for something else to fill it. WeChat and AliPay has done that.
It’d take a LOT of effort to build a platform like Paytm for the U.S., nevermind other markets. You can’t just buy a microblogging platform and magically redevelop it into something like Paytm. He’d need to partner with other businesses and whatnot, and I just don’t see there being any sort of interest in that kind of partnership.
There’s been attempts to build these sorts of “everything apps” before. Facebook has tried and failed. I think Snapchat has tried it. Apps here in the west tend to focus on doing a single or a handful of tasks really well. If an app ends up doing too much, it’s often split into several apps.