Actually, the better one doesn't matter here since both yield limitless opportunities. Just look for one that's more comfortable for you to use.

This is a good idea after all. However, this may be impossible to do as of now, and you might need to rely on a computer in the end.

Thank you so much. Freebies is definitely best especially if there's something to learn in it. I just got this reply quite late. But still, thank you!

Yes, there are power uses when earning bitcoins, especially if you're one of those miners. Mining requires high powered computers in the first place.

With the current economy, expect that the government will find ways to consider bitcoin as illegitimate. But we're still hoping that it won't.

These are called as hardware wallets. They come in the form of USBs or SSD cards. However, purchasing one may cost you more.