HF did an amazing job in community building, transformers library and being the central store for all oss models. That said they are ages away from PMF and just have a bunch of different products non of them commercially successful (services, autotrain, quantization, HF hub for EE, inference end points etc). The majority of their revenue comes from partnerships with SageMaker/Azure where they pay them for sending users their way which wouldn't continue to grow.
While it's always a possibility for a FANG company to buy them IMO they are completely screwed. At a $4.5B valuation they will have to reach at minimum $250m in ARR to IPO and at the moment they're probably stuck at around $25m ARR.