I find the news of low quality, they missed (with intention or not) some interesting points from the
original report.
First miss: they've asked only the 16+ brits. It's important, since I expect more 14-16 y.o. know about this than 60+
Second: "Nearly three in four of those surveyed hadn’t heard of cryptocurrencies or were unable to define what they are correctly." The fact you cannot define properly what's that is different from not hearing about them. Quite misleading imho. The "never heard of it" is 58% which sounds more "normal".
Also it depends on how the question looked like. Many may have heard of Bitcoin, but not about cryptocurrencies (tough word for many).
Imho these things should clearly be there in a news article in a crypto-focused newspaper.
I tend to not pay too much attention to the polls like that since they depend on both how you ask the questions and who you ask the questions
same question , as mentioned above , "have you heard of it" results in a 50% + - , which is way more accurate IMHO
once I asked my friends and relatives , out of interest , if they knew what bitcoin was and 90% of them said that they heard about it
when I tried to get them explain what bitcoin was , only about 20% were able to , rest could not
once bitcoin is out there, in everyday's lifes and on TV (more than now) I expect the figures to be much higher