People just love to compare things... The only relation between gold and bitcoin is them being valued in USD, But bitcoin, rather than a commodity that can only be sold to be used, is a currency usable for buying things online and offline. Although people do hold bitcoins aiming for price rise, I still see them as fundamentally different things.

There are few methods to earn more bitcoins if you have some to invest, these include trading USD and BTC (Like BTC-E) or trading bitcoin and altcoins, which is much more dangerous for new rising altcoins but can generate huge profit if done correctly,
For people not making investments, Faucets, Giveaways and random campaigns are the most common methods.

it isn't a secret trick or the like actually, everyone knows it but allot ignore it, Have a BTC wallet for cold storage out of the internet, for majority of coins, 2)  always use a good AV and 3) be careful, don't click download on the shady fake program, That's probably it (also add a password and encrypt your Private keys, but don't forget it).

And the last game of this season is the game played yesterday, Golden State delivered a stellar game like they did in game 1 and 2. when Cleveland didn't play very awfully, but the made a great shooting show, This is another +130 pts game for them this series.