Blockchain technology of which cryptocurrencies are a part requires educational drive to the multitude.

Government/Large Corporations together with a handful of exceptionally rich families rule the world with regulation, e-commerce, normally greed.

Small business would thrive using cryptocurrencies, as mentioned taxi drivers, fruit and vegetable stores, Mom & Pop stores, accommodation, non-profit organisations, would stand to profit using crypto, once they know how.

As can be seen from possible entry into Africa, an article on how everyone is falling in line with USA rulings (I really don't think this was the idea behind blockchain technology; certain governments laying down the law) https://cointelegraph.com/news/145-bln-south-african-investment-firm-to-launch-crypto-exchange

For those wishing to go in on a small scale in Africa you have to be aware of mishaps along the way, working with small cryptocurrencies in my mind where security it upheld paves the way for ease of mining a token/coin system - Safety has to remain a highest priority. http://www.itwebafrica.com/security/513-africa/244345-crypto-mining-malware-a-major-threat-to-african-markets

In my honest opinion, I support the idea of decentralization where a form of bartering can take place, buying/selling on a peer to peer method, directly profiting the person not feeding the banks (especially over borders, where people wishing to earn are unable to grow at all)

Here is a link to the concept that interested me back in 2010, still relevant to what is happening today http://www.no-straight-lines.com/