Congrats on the profit. I also profited from a downside trade between Mar - Nov 2017. These are only short term however.
What else is it if it is not Uber / ride sharing that is causing the down trend in Taxi usage? Just coincidence maybe that it started when Uber entered? I think not.
I have actually tried a Taxi and Uber. Many many times. That is a big reason for the short research.
Might be okay to hail a Taxi in the CBD. Much more inconvenient anywhere else. The 13CABS app compared to Uber in Australia is downloaded much much less and it has improved things of course, but seems a drop in the bucket. The horse has bolted.