The best method of growing altcoins is by trading it. Trading altcoins everytime is the only way to grow altcoins like exchanging to btc when price is good and buying bck when price comes down.
Day trading can be profitable but the losing phase is not welcomed by novice traders. They usually start with newbie luck and gain few bucks, later things tuns against their interest. The market does its job and they learn their valuable lesson when it is too late. Demo trading can teach the new traders the ways for earning and how to protect the initial investment balance without losing the big portion to the market movements which you traded facing the main market trend. Altcoin traders know this and they avoid to trade with the full margin accounts on perpetual bitcoin trading platforms.