However, even if Bitcoin was eventually accepted by Uber, I don't see how this would benefit "crypto" directly. Ridesharing can be one piece in the puzzle to achieve the usage of Bitcoin "as a currency" and thus increase its exposition and adoption (and ultimately, its price). But there are dozens of other pieces to solve. It will be a slow process, I think.
The reason why people do use Bitcoin little for payments is basically volatility - if price rises, most people prefer to hodl (many companies have ceased to accept Bitcoin just in the 2017 bubble), while when it falls, they panic-sell it for fiat. It would be a big advancement if it was made more attractive in bear markets and short-term market downturns to pay goods/services with it. Maybe if Uber adopted this model, volatility could decrease and crypto would benefit massively