Community is crucial for the success of any Crypto. That is, if you define community not just as the people purchasing/mining the currency, but also companies where you can spend it. Otherwise it's just a dead coin without any real meaning.

So it's more a total circle, mining/buying/spending, that will make or break a coin.

Also it's important that there is no big influencer that can influence the price, which is currently a problem with many of the cryptos, including Steem.