I think that the community is a hugely important part of cryptocurrency success. If you look at every single coin in the top 100 on CoinMarketCap you will see that each of them has developed a community that is highly supportive of the project. It is one of the things I look for when I am assessing new coins for investment. For an example of the kind of community that can take a coin from obscurity to success take a look at the one backing DarkPayCoin.
https://discord.gg/XAPNYkZ