There are a million ways to make coins.
- play challenges, complete the objectives and achieve milestones
- Play CS/Hut champs
- Market watch, 59th minute sniper
- Buy “coins” online
- Buy a few hundred packs and quick sell the crap.
The easiest, but most costly method is the last one i mentioned. Within a few hours, you could have 300K — 1M in coins depending on how many packs you open.