SHOULD I EVEN INVEST IN BITCOIN?

There is never a solid way to tell if it is a "good idea" or a "bad idea." The market can sway in any direction at any given moment, and you need to be ready for it. I would be more open to suggesting the idea of investing into alternate coins as it's easier to make a profit with them.

The value of BTC tanked the other day, and it's been steadily climbing back up since.

Do not invest what you can't afford to lose.