I just ask them if they've ever tried sending money abroad. If they say yes I ask them what the experience was like. This invariably comes back negative. I they say imagine if you could send money abroad instantly with little to no fees and they agree this would be great and thats when I hit them with this article

https://globalcoinreport.com/a-99-million-transaction-with-litecoin-ltc-and-the-lightest-fee/