First of all, why wouldn't a taxi company just accept bitcoin?
While some New York City taxi companies have experimented with accepting Bitcoin as a form of payment, the long transfer times have always arisen as an issue for this industry.
Second of all, like any company - no business will actually accept the digital currency. In order to avoid having to deal with capital gains/loses the business is going to use a money processor like bitpay.com or coinbase.com to first convert the money into local currency. You guys do realize no legitimate company would actually accept the digital coin itself. I can assure you coming from a person who has helped multiple businesses and charities setup the infrastructure to accept bitcoin - they all want to make sure it's actually hitting their pockets in USD.
The Quicksilver mobile app will be designed with immediate QSLV to USD transfer, thus protecting cab companies from fluctuating exchange rates. This will be accomplished through an exchange API with a QSLV to USD market.
So that leads me to my third point - which would be if business need to accept cash. Then to make this coin the "currency" of taxi services somebody will need to convert this coin into bitcoin - so the taxi companies can accept cash. So now you're getting into the whole legal and compliance issue of having someone take the responsibility of money transmitter. It did not appear anyone has stepped up to that challenge here yet.
Quicksilver is not looking to capture any of the cash payment sector--the target market for Quicksilver is the credit card payment sector of New York City's taxicab industry (which makes up 55% of transactions). There is currently no law on the books preventing taxi companies from accepting cryptocurrency in payment for their services, as is further reinforced through the several taxi companies who already have experimented with Bitcoin payments.
Crypto has just become a sad world. Really I am ashamed to be associated with this entire community.
Quicksilver represents a concentrated effort to spur cryptocurrency adoption in a meaningful fashion and on an attainable scale. Along with providing the funding needed to develop the Quicksilver mobile app, the branding, and marketing materials, the presale is acting as a judge of community interest for this project. If enough funds are not raised to carry this project to completion, then Bittrex will simply refund each investor their BTC through a buy wall on the QSLV market, leaving no one any worse off barring my personal time and money invested in the project.