The future of crypto currencies is unknown, but it is a new generation of Money which is already replacing the paper currency, especially Bitcoin been the most popular and successful among other crypto currencies so far, bitcoiners need to know that currently Bitcoin is trading low from its all time high, Bitcoin should not be viewed as a short term Investment, but should be seeing as a long term life changing investment due to its liquidity and high returns when trading high.
Bitcoin is a digital currency that has come to stay, as long as the internet stays , most persons that didn't believe in Bitcoin 10years ago regretted it, that will be also be the case for people who don't be in it now come 2034.so think positively take the risk and Investment in Bitcoin today.
There might be some differences in countries that feel more open towards digital payments and countries that love their cash and don't want to stop using it. Without these cultural differences I would say the view of the average citizen of a country on bitcoin all depends on the age. The younger a person is the more likely he is to be open towards new forms of money and payment. The older generations are so used to their way of life that it's hard to change their point if view and become favorable to something new. I can see that in my family very well, my cousin is still in university and loves crypto currencies. He doesn't have a lot of money and doesn't trade any cryptos himself, but I gave him a few coins and a wallet for his last birthday. Every time we see each other we talk about cryptos. Then there is my grandmother who is above 90 and has no clue about cryptos, she doesn't even use credit or debit cards. In the middle is my uncle that is interested but doesn't own any coins. I would say the average citizen is positive towards cryptos as long as they are below 70 years.