Currency should be easily used and transacted for trades and deals. People could buy bitcoin after being familiar with crypto but most of them won't even try a crypto if their first experience of crypto was costly and late.
Of course this does not help Bitcoin / Bitcoin Cash either : https://dashnews.org/bitcoin-and-bitcoin-cash-to-be-dropped-at-400-australian-merchants-post-double-spend-exploit/
How can Bitcoin be the face of cryptocurrency, when it has a double-spend exploit
If people really want to promote cryptocurrency, they need to setup grassroot movements in those countries that are suffering from high inflation / hyperinflation
and educate the people there on the ground on how a (payment-focussed) cryptocurrency works (Dash for example) and how such a cryptocurrency can be used for everyday purchases.
That is where real adoption takes place and where promotion is needed.