We can see these days that not all people know cryptocurrencies, if they do perhaps they have heard only about bitcoin, but without owning or having the experience of making any transactions.
Maybe altcoins will become popular within 3 years from now?
Nowadays, it can't be deny that there are lot of altcoins in the market. All of them also has an opportunity to become popular whether in good terms or not. But in my assessment only few of the altcoins only can able to survive in the market and those are belong to top 20 altcoins in the market as well, but this is just base in my opinion.