As an european, I disagree strongly. Uber has improved my standard of living significantly. However has to be noted that taxi regulation varies greatly from country to country.
All this smart contract talk makes me somewhat sceptical. There have been a lot of talk about code replacing lawyers for years now, I still see very little of that actually happening. Can you name any cool smart contract use cases?
Well, crypto/bitcoin businesses in general tend to be quite lucrative. However lots of risks as well. For a security researcher there are no downside risks as much.